CAPE CANAVERAL, Fla. -- STS-135 Commander Chris Ferguson, left, and NASA Kennedy Space Center Director Bob Cabana talk about the successful STS-135 mission to the International Space Station. Behind Ferguson are Pilot Doug Hurley and Mission Specialist Sandy Magnus. Ferguson and his three crew members safely brought space shuttle Atlantis home to the Shuttle Landing Facility's Runway 15 at NASA's Kennedy Space Center in Florida at 5:57 a.m. EDT bringing a close NASA's Space Shuttle Program. Atlantis' final return from space completed a 13-day, 5.2-million-mile journey to the International Space Station. STS-135 delivered spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- The STS-135 crew members are congratulated on their successful mission to the International Space Station. Four astronauts brought space shuttle Atlantis home to the Shuttle Landing Facility's Runway 15 at NASA's Kennedy Space Center in Florida at 5:57 a.m. EDT bringing a close NASA's Space Shuttle Program. Atlantis' final return from space completed a 13-day, 5.2-million-mile journey to the International Space Station. STS-135 delivered spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- The STS-135 Mission Specialist Sandy Magnus, center, chats underneath space shuttle Atlantis following a successful mission to the International Space Station. Four astronauts brought Atlantis home to the Shuttle Landing Facility's Runway 15 at NASA's Kennedy Space Center in Florida at 5:57 a.m. EDT bringing a close NASA's Space Shuttle Program. Atlantis' final return from space completed a 13-day, 5.2-million-mile journey to the International Space Station. STS-135 delivered spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- The landing convoy that will make space shuttle Atlantis safe and secure for towing to its processing hangar begins to pull up around the spacecraft following wheelstop on the Shuttle Landing Facility's Runway 15 at NASA's Kennedy Space Center in Florida. Atlantis' final return from space at 5:57 a.m. EDT completed the 13-day, 5.2-million-mile STS-135 mission. Securing the space shuttle fleet's place in history, Atlantis safely and successfully brought a close to NASA's Space Shuttle Program. STS-135 delivered spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- STS-135 Commander Chris Ferguson leads his crew out of the Crew Transport Vehicle (CTV) following brief and standard medical checks. Behind Ferguson is Pilot Doug Hurley. Four astronauts brought space shuttle Atlantis home to the Shuttle Landing Facility's Runway 15 at NASA's Kennedy Space Center in Florida at 5:57 a.m. EDT bringing a close NASA's Space Shuttle Program. Atlantis' final return from space completed a 13-day, 5.2-million-mile journey to the International Space Station. STS-135 delivered spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- As the sun rises over Florida's Space Coast, the landing convoy crew that will make space shuttle Atlantis safe and secure for towing to its processing hangar begins to work on the spacecraft following wheelstop on the Shuttle Landing Facility's Runway 15 at NASA's Kennedy Space Center. Atlantis' final return from space at 5:57 a.m. EDT completed the 13-day, 5.2-million-mile STS-135 mission. Securing the space shuttle fleet's place in history, Atlantis safely and successfully brought a close to NASA's Space Shuttle Program. STS-135 delivered spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- The landing convoy crew that will make space shuttle Atlantis safe and secure for towing to its processing hangar works on the spacecraft following wheelstop on the Shuttle Landing Facility's Runway 15 at NASA's Kennedy Space Center. Atlantis' final return from space at 5:57 a.m. EDT completed the 13-day, 5.2-million-mile STS-135 mission. Securing the space shuttle fleet's place in history, Atlantis brought a close to NASA's Space Shuttle Program. STS-135 delivered spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- The STS-135 crew admires space shuttle Atlantis following the successful mission to the International Space Station. Four astronauts brought Atlantis home to the Shuttle Landing Facility's Runway 15 at NASA's Kennedy Space Center in Florida at 5:57 a.m. EDT bringing a close NASA's Space Shuttle Program. Atlantis' final return from space completed a 13-day, 5.2-million-mile journey to the International Space Station. STS-135 delivered spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- The STS-135 crew members are congratulated on their successful mission to the International Space Station. Four astronauts brought space shuttle Atlantis home to the Shuttle Landing Facility's Runway 15 at NASA's Kennedy Space Center in Florida at 5:57 a.m. EDT bringing a close NASA's Space Shuttle Program. Atlantis' final return from space completed a 13-day, 5.2-million-mile journey to the International Space Station. STS-135 delivered spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- NASA Administrator Charlie Bolden talks about bookending the space agency's Space Shuttle Program following the successful STS-135 mission to the International Space Station. The program's final four astronauts look on, from left: Mission Specialists Rex Walheim and Sandy Magnus, Pilot Doug Hurley, and Commander Chris Ferguson. The crew brought space shuttle Atlantis home to the Shuttle Landing Facility's Runway 15 at NASA's Kennedy Space Center in Florida at 5:57 a.m. EDT. Atlantis' final return from space completed a 13-day, 5.2-million-mile journey to the International Space Station. STS-135 delivered spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- The STS-135 crew members are congratulated on their successful mission to the International Space Station. Four astronauts brought space shuttle Atlantis home to the Shuttle Landing Facility's Runway 15 at NASA's Kennedy Space Center in Florida at 5:57 a.m. EDT bringing a close NASA's Space Shuttle Program. Atlantis' final return from space completed a 13-day, 5.2-million-mile journey to the International Space Station. STS-135 delivered spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- The final four astronauts of NASA's Space Shuttle Program stand proudly in front of space shuttle Atlantis, the remarkable spacecraft that took them on the STS-135 mission to the International Space Station. From left, are Mission Specialists Rex Walheim and Sandy Magnus, Pilot Doug Hurley, and Commander Chris Ferguson. The crew returned to Earth on the Shuttle Landing Facility's Runway 15 at NASA's Kennedy Space Center in Florida at 5:57 a.m. EDT. Atlantis' final return from space completed a 13-day, 5.2-million-mile journey to the International Space Station. STS-135 delivered spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- The final four astronauts of NASA's Space Shuttle Program stand proudly in front of space shuttle Atlantis, the remarkable spacecraft that took them on the STS-135 mission to the International Space Station. From left, are Mission Specialists Rex Walheim and Sandy Magnus, Pilot Doug Hurley, and Commander Chris Ferguson. The crew returned to Earth on the Shuttle Landing Facility's Runway 15 at NASA's Kennedy Space Center in Florida at 5:57 a.m. EDT. Atlantis' final return from space completed a 13-day, 5.2-million-mile journey to the International Space Station. STS-135 delivered spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- STS-135 Commander Chris Ferguson leads his crew out of the Crew Transport Vehicle (CTV) following brief and standard medical checks. Behind Ferguson are Pilot Doug Hurley, and Mission Specialists Sandy Magnus and Rex Walheim. The final four astronauts of NASA's Space Shuttle Program brought space shuttle Atlantis home to the Shuttle Landing Facility's Runway 15 at NASA's Kennedy Space Center in Florida at 5:57 a.m. EDT. Atlantis' final return from space completed a 13-day, 5.2-million-mile journey to the International Space Station. STS-135 delivered spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- Shuttle Launch Director Mike Leinbach proudly displays a space shuttle Atlantis banner for STS-135 Commander Chris Ferguson, front right, and Pilot Doug Hurley. Four astronauts brought Atlantis home to the Shuttle Landing Facility's Runway 15 at NASA's Kennedy Space Center in Florida at 5:57 a.m. EDT bringing a close NASA's Space Shuttle Program. Atlantis' final return from space completed a 13-day, 5.2-million-mile journey to the International Space Station. STS-135 delivered spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- The landing convoy that will make space shuttle Atlantis safe and secure for towing to its processing hangar begins to pull up around the spacecraft following wheelstop on the Shuttle Landing Facility's Runway 15 at NASA's Kennedy Space Center in Florida. Atlantis' final return from space at 5:57 a.m. EDT completed the 13-day, 5.2-million-mile STS-135 mission. Securing the space shuttle fleet's place in history, Atlantis safely and successfully brought a close to NASA's Space Shuttle Program. STS-135 delivered spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- The STS-135 Mission Specialist Rex Walheim, front center, takes a stroll underneath space shuttle Atlantis following a successful mission to the International Space Station. Four astronauts brought Atlantis home to the Shuttle Landing Facility's Runway 15 at NASA's Kennedy Space Center in Florida at 5:57 a.m. EDT bringing a close NASA's Space Shuttle Program. Atlantis' final return from space completed a 13-day, 5.2-million-mile journey to the International Space Station. STS-135 delivered spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- STS-135 Commander Chris Ferguson, front right, and Pilot Doug Hurley are congratulated by Space Shuttle Program Manager John Shannon, front left, Space Shuttle Program Deputy Manager LeRoy Cain, and NASA Kennedy Space Center Director Bob Cabana on their successful mission to the International Space Station. Four astronauts brought space shuttle Atlantis home to the Shuttle Landing Facility's Runway 15 at NASA's Kennedy Space Center in Florida at 5:57 a.m. EDT bringing a close NASA's Space Shuttle Program. Atlantis' final return from space completed a 13-day, 5.2-million-mile journey to the International Space Station. STS-135 delivered spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- NASA Kennedy Space Center Director Bob Cabana, left, congratulates STS-135 Pilot Doug Hurley on the successful STS-135 mission to the International Space Station. Next to Hurley is Commander Chris Ferguson, and behind him are Mission Specialists Sandy Magnus, left, and Rex Walheim. The final four astronauts of NASA's Space Shuttle Program brought space shuttle Atlantis home to the Shuttle Landing Facility's Runway 15 at NASA's Kennedy Space Center in Florida at 5:57 a.m. EDT. Atlantis' final return from space completed a 13-day, 5.2-million-mile journey to the International Space Station. STS-135 delivered spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- NASA Kennedy Space Center Director Bob Cabana, left, congratulates STS-135 Commander Chris Ferguson on the successful STS-135 mission to the International Space Station. Behind Ferguson are Pilot Doug Hurley and Mission Specialist Sandy Magnus. Ferguson and his three crew members safely brought space shuttle Atlantis home to the Shuttle Landing Facility's Runway 15 at NASA's Kennedy Space Center in Florida at 5:57 a.m. EDT bringing a close NASA's Space Shuttle Program. Atlantis' final return from space completed a 13-day, 5.2-million-mile journey to the International Space Station. STS-135 delivered spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- The final astronauts of NASA's Space Shuttle Program reflect on their successful STS-135 mission to the International Space Station in front of space shuttle Atlantis. From left, are Mission Specialist Sandy Magnus, Pilot Doug Hurley and Commander Chris Ferguson. Four astronauts returned to Earth on the Shuttle Landing Facility's Runway 15 at NASA's Kennedy Space Center in Florida at 5:57 a.m. EDT. Atlantis' final return from space completed a 13-day, 5.2-million-mile journey to the International Space Station. STS-135 delivered spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- NASA Kennedy Space Center Director Bob Cabana, left, congratulates STS-135 Mission Specialist Sandy Magnus on the successful STS-135 mission to the International Space Station. In front of Magnus is Pilot Doug Hurley. Magnus and her three crew members brought space shuttle Atlantis home to the Shuttle Landing Facility's Runway 15 at NASA's Kennedy Space Center in Florida at 5:57 a.m. EDT bringing a close NASA's Space Shuttle Program. Atlantis' final return from space completed a 13-day, 5.2-million-mile journey to the International Space Station. STS-135 delivered spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- The STS-135 crew members are congratulated on their successful mission to the International Space Station. Four astronauts brought space shuttle Atlantis home to the Shuttle Landing Facility's Runway 15 at NASA's Kennedy Space Center in Florida at 5:57 a.m. EDT bringing a close NASA's Space Shuttle Program. Atlantis' final return from space completed a 13-day, 5.2-million-mile journey to the International Space Station. STS-135 delivered spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- NASA Administrator Charlie Bolden talks about bookending the space agency's Space Shuttle Program following the successful STS-135 mission to the International Space Station. Four astronauts brought Atlantis home to the Shuttle Landing Facility's Runway 15 at NASA's Kennedy Space Center in Florida at 5:57 a.m. EDT. Atlantis' final return from space completed a 13-day, 5.2-million-mile journey to the International Space Station. STS-135 delivered spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- Employees admire space shuttle Atlantis as the landing convoy crew makes the vehicle safe for towing to its processing hangar at NASA's Kennedy Space Center in Florida. Atlantis' final return to Earth on the Shuttle Landing Facility's Runway 15 at NASA's Kennedy Space Center in Florida occurred at 5:57 a.m. EDT. Completing the 13-day, 5.2-million-mile STS-135 mission, Atlantis secured the space shuttle fleet's place in history and brought a close to NASA's Space Shuttle Program. STS-135 delivered spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- The STS-135 crew members are congratulated on their successful mission to the International Space Station. Four astronauts brought space shuttle Atlantis home to the Shuttle Landing Facility's Runway 15 at NASA's Kennedy Space Center in Florida at 5:57 a.m. EDT bringing a close NASA's Space Shuttle Program. Atlantis' final return from space completed a 13-day, 5.2-million-mile journey to the International Space Station. STS-135 delivered spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- STS-135 Commander Chris Ferguson talks about bookending NASA's Space Shuttle Program following his successful mission to the International Space Station. Looking on, from left, are NASA Administrator Charlie Bolden, Mission Specialists Rex Walheim and Sandy Magnus, Pilot Doug Hurley, and Commander Chris Ferguson. The STS-135 crew brought space shuttle Atlantis home to the Shuttle Landing Facility's Runway 15 at NASA's Kennedy Space Center in Florida at 5:57 a.m. EDT. Atlantis' final return from space completed a 13-day, 5.2-million-mile journey to the International Space Station. STS-135 delivered spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- STS-135 Commander Chris Ferguson leads his crew out of the Crew Transport Vehicle (CTV) following brief and standard medical checks. Behind Ferguson are Pilot Doug Hurley, and Mission Specialists Sandy Magnus and Rex Walheim. The final four astronauts of NASA's Space Shuttle Program brought space shuttle Atlantis home to the Shuttle Landing Facility's Runway 15 at NASA's Kennedy Space Center in Florida at 5:57 a.m. EDT. Atlantis' final return from space completed a 13-day, 5.2-million-mile journey to the International Space Station. STS-135 delivered spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- Space shuttle Atlantis, attached to its external fuel tank and solid rocket boosters atop a mobile launcher platform, awaits its final journey from the Vehicle Assembly Building to Launch Pad 39A at NASA's Kennedy Space Center in Florida. "Rollout," as it's called, began at 8:42 p.m. EDT. It will take the crawler-transporter about six hours to carry the shuttle stack to its seaside launch pad. The milestone move paves the way for the launch of the STS-135 mission to the International Space Station, targeted for July 8. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- STS-135 Pilot Doug Hurley, left, and Commander Chris Ferguson put on the finishing touches of their launch-and-entry suits with the help of United Space Alliance suit technicians in the Operations and Checkout Building at NASA's Kennedy Space Center in Florida. Hurley and Ferguson are two of the final four astronauts to launch aboard a space shuttle. STS-135 is scheduled to lift off aboard space shuttle Atlantis at 11:26 a.m. EDT on July 8 for a mission to the International Space Station. STS-135 will deliver the Raffaello multi-purpose logistics module packed with supplies and spare parts for the orbiting outpost. Atlantis also will fly the Robotic Refueling Mission experiment that will investigate the potential for robotically refueling existing satellites in orbit. In addition, Atlantis will return with a failed ammonia pump module to help NASA better understand the failure mechanism and improve pump designs for future systems. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- Space shuttle Atlantis' bright-white, iconic frame illuminates the darkness as it touches down on the Shuttle Landing Facility's Runway 15 at NASA's Kennedy Space Center in Florida for the final time. Securing the space shuttle fleet's place in history, Atlantis marked the 26th nighttime landing of NASA's Space Shuttle Program and the 78th landing at Kennedy. Main gear touchdown was at 5:57:00 a.m. EDT, followed by nose gear touchdown at 5:57:20 a.m., and wheelstop at 5:57:54 a.m. On board are STS-135 Commander Chris Ferguson, Pilot Doug Hurley, and Mission Specialists Sandra Magnus and Rex Walheim. On the 37th shuttle mission to the International Space Station, STS-135 delivered more than 9,400 pounds of spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- Space shuttle Atlantis, attached to its external fuel tank and solid rocket boosters atop a mobile launcher platform, makes its final debut outside the Vehicle Assembly Building. "Rollout," as it's called, to Launch Pad 39A at NASA's Kennedy Space Center in Florida began at 8:42 p.m. EDT. It will take the crawler-transporter about six hours to carry the shuttle stack to its seaside launch pad. The milestone move paves the way for the launch of the STS-135 mission to the International Space Station, targeted for July 8. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- STS-135 Commander Chris Ferguson and Pilot Doug Hurley perform touch-and-go landings on the Shuttle Landing Facility runway at NASA's Kennedy Space Center in Florida. The pilot and commander of every shuttle mission routinely practice landings aboard Shuttle Training Aircraft, which are Gulfstream II jets modified to mimic the shuttle's handling during the final phase of landing. The STS-135 flight crew of four arrived aboard T-38 training jets to watch two historic milestones of NASA's Space Shuttle Program -- the final landing of shuttle Endeavour, which will bookend its STS-134 mission to the International Space Station, and the final rollout of their vehicle, space shuttle Atlantis, to Launch Pad 39A. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of the shuttle program. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- Bathed in xenon lights, space shuttle Atlantis passes the Turn Basin as it makes its final journey from the Vehicle Assembly Building to Launch Pad 39A at NASA's Kennedy Space Center in Florida. First motion was at 8:42 p.m. EDT. It will take the crawler-transporter about six hours to carry the shuttle, attached to its external fuel tank and solid rocket boosters, to the seaside launch pad. The milestone move paves the way for the launch of the STS-135 mission to the International Space Station, targeted for July 8. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Troy Cryder

CAPE CANAVERAL, Fla. -- Xenons light the way home as space shuttle Atlantis' iconic white frame appears over the Shuttle Landing Facility's Runway 15 at NASA's Kennedy Space Center in Florida for the last time. Securing the space shuttle fleet's place in history, Atlantis marked the 26th nighttime landing of NASA's Space Shuttle Program and the 78th landing at Kennedy. Main gear touchdown was at 5:57:00 a.m. EDT, followed by nose gear touchdown at 5:57:20 a.m., and wheelstop at 5:57:54 a.m. On board are STS-135 Commander Chris Ferguson, Pilot Doug Hurley, and Mission Specialists Sandra Magnus and Rex Walheim. On the 37th shuttle mission to the International Space Station, STS-135 delivered more than 9,400 pounds of spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Sandra Joseph

CAPE CANAVERAL, Fla. -- Xenons light the way home for space shuttle Atlantis at NASA's Kennedy Space Center in Florida for the final time. Securing the space shuttle fleet's place in history, Atlantis marked the 26th nighttime landing of NASA's Space Shuttle Program and the 78th landing at Kennedy. Main gear touchdown on the Shuttle Landing Facility's Runway 15 was at 5:57:00 a.m. EDT, followed by nose gear touchdown at 5:57:20 a.m., and wheelstop at 5:57:54 a.m. On board are STS-135 Commander Chris Ferguson, Pilot Doug Hurley, and Mission Specialists Sandra Magnus and Rex Walheim. On the 37th shuttle mission to the International Space Station, STS-135 delivered more than 9,400 pounds of spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Sandra Joseph

CAPE CANAVERAL, Fla. -- Space shuttle Atlantis' bright-white, iconic frame illuminates the darkness as it touches down on the Shuttle Landing Facility's Runway 15 at NASA's Kennedy Space Center in Florida for the final time. Securing the space shuttle fleet's place in history, Atlantis marked the 26th nighttime landing of NASA's Space Shuttle Program and the 78th landing at Kennedy. Main gear touchdown was at 5:57:00 a.m. EDT, followed by nose gear touchdown at 5:57:20 a.m., and wheelstop at 5:57:54 a.m. On board are STS-135 Commander Chris Ferguson, Pilot Doug Hurley, and Mission Specialists Sandra Magnus and Rex Walheim. On the 37th shuttle mission to the International Space Station, STS-135 delivered more than 9,400 pounds of spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Sandra Joseph

CAPE CANAVERAL, Fla. -- Space shuttle Atlantis' bright-white, iconic frame appears from the darkness at it touches down on the Shuttle Landing Facility's Runway 15 at NASA's Kennedy Space Center in Florida for the final time. Securing the space shuttle fleet's place in history, Atlantis marked the 26th nighttime landing of NASA's Space Shuttle Program and the 78th landing at Kennedy. Main gear touchdown was at 5:57:00 a.m. EDT, followed by nose gear touchdown at 5:57:20 a.m., and wheelstop at 5:57:54 a.m. On board are STS-135 Commander Chris Ferguson, Pilot Doug Hurley, and Mission Specialists Sandra Magnus and Rex Walheim. On the 37th shuttle mission to the International Space Station, STS-135 delivered more than 9,400 pounds of spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Linda Perry

CAPE CANAVERAL, Fla. -- Dressed in their bright-orange launch-and-entry suits, the final four astronauts to launch aboard a space shuttle wave to media and employees cheering them on in front of the Astronaut Crew Quarters in the Operations and Checkout Building at NASA's Kennedy Space Center in Florida. From left, are STS-135 Mission Specialists Rex Walheim and Sandy Magnus, Pilot Doug Hurley, and Commander Chris Ferguson. The silver Astrovan will take the astronauts to Launch Pad 39A, where they will board space shuttle Atlantis for a scheduled liftoff at 11:26 a.m. EDT on July 8 for their mission to the International Space Station. STS-135 will deliver the Raffaello multi-purpose logistics module packed with supplies and spare parts for the orbiting outpost. Atlantis also will fly the Robotic Refueling Mission experiment that will investigate the potential for robotically refueling existing satellites in orbit. In addition, Atlantis will return with a failed ammonia pump module to help NASA better understand the failure mechanism and improve pump designs for future systems. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information, visit www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- After 30 years and 135 missions, residents and visitors to Florida's Space Coast see this rocket's red glare for the last time as space shuttle Atlantis soars past the American flag after lifting off Launch Pad 39A at NASA's Kennedy Space Center in Florida at 11:29 a.m. EDT on July 8. On board are four experienced astronauts -- STS-135 Commander Chris Ferguson, Pilot Doug Hurley, and Mission Specialists Sandy Magnus and Rex Walheim. STS-135 will deliver the Raffaello multi-purpose logistics module packed with supplies and spare parts for the International Space Station. Atlantis also will fly the Robotic Refueling Mission experiment that will investigate the potential for robotically refueling existing satellites in orbit. In addition, Atlantis will return with a failed ammonia pump module to help NASA better understand the failure mechanism and improve pump designs for future systems. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Fletcher Hildreth

CAPE CANAVERAL, Fla. -- Xenons light the way home as space shuttle Atlantis' iconic white frame appears over the Shuttle Landing Facility's Runway 15 at NASA's Kennedy Space Center in Florida for the last time. Securing the space shuttle fleet's place in history, Atlantis marked the 26th nighttime landing of NASA's Space Shuttle Program and the 78th landing at Kennedy. Main gear touchdown was at 5:57:00 a.m. EDT, followed by nose gear touchdown at 5:57:20 a.m., and wheelstop at 5:57:54 a.m. On board are STS-135 Commander Chris Ferguson, Pilot Doug Hurley, and Mission Specialists Sandra Magnus and Rex Walheim. On the 37th shuttle mission to the International Space Station, STS-135 delivered more than 9,400 pounds of spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Sandra Joseph

CAPE CANAVERAL, Fla. -- Space shuttle Atlantis' drag chute is illuminated as the spacecraft glides to a stop on Runway 15 at NASA's Kennedy Space Center in Florida for the last time. Securing the space shuttle fleet's place in history, Atlantis marked the 26th nighttime landing of NASA's Space Shuttle Program and the 78th landing at Kennedy. Main gear touchdown was at 5:57:00 a.m. EDT, followed by nose gear touchdown at 5:57:20 a.m., and wheelstop at 5:57:54 a.m. On board are STS-135 Commander Chris Ferguson, Pilot Doug Hurley, and Mission Specialists Sandra Magnus and Rex Walheim. CAPE CANAVERAL, Fla. -- Xenons cast a halo of light on space shuttle Atlantis as the spacecraft approaches Runway 15 at NASA's Kennedy Space Center in Florida for the last time. Securing the space shuttle fleet's place in history, Atlantis marked the 26th nighttime landing of NASA's Space Shuttle Program and the 78th landing at Kennedy. Main gear touchdown was at 5:57:00 a.m. EDT, followed by nose gear touchdown at 5:57:20 a.m., and wheelstop at 5:57:54 a.m. On board are STS-135 Commander Chris Ferguson, Pilot Doug Hurley, and Mission Specialists Sandra Magnus and Rex Walheim. On the 37th shuttle mission to the International Space Station, STS-135 delivered more than 9,400 pounds of spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Carl Winebarger

CAPE CANAVERAL, Fla. -- Ribbons of steam and smoke trail space shuttle Atlantis as it nears touch down on the Shuttle Landing Facility's Runway 15 at NASA's Kennedy Space Center in Florida for the final time. Securing the space shuttle fleet's place in history, Atlantis marked the 26th nighttime landing of NASA's Space Shuttle Program and the 78th landing at Kennedy. Main gear touchdown was at 5:57:00 a.m. EDT, followed by nose gear touchdown at 5:57:20 a.m., and wheelstop at 5:57:54 a.m. On board are STS-135 Commander Chris Ferguson, Pilot Doug Hurley, and Mission Specialists Sandra Magnus and Rex Walheim. On the 37th shuttle mission to the International Space Station, STS-135 delivered more than 9,400 pounds of spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- Bright xenon lights usher space shuttle Atlantis down a 3.4-mile stretch of river rocks as the vehicle embarks on its historic final journey from the Vehicle Assembly Building to Launch Pad 39A at NASA's Kennedy Space Center in Florida. "Rollout," as it's called, began at 8:42 p.m. EDT. It will take the crawler-transporter about six hours to carry Atlantis, attached to its external fuel tank and solid rocket boosters atop a mobile launcher platform, to the seaside launch pad. The milestone move paves the way for the launch of the STS-135 mission to the International Space Station, targeted for July 8. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. -- Seen from the roof of the Vehicle Assembly Building, space shuttle Atlantis thunders off Launch Pad 39A at NASA's Kennedy Space Center in Florida. Atlantis began its final flight, the STS-135 mission to the International Space Station, at 11:29 a.m. EDT on July 8. STS-135 will deliver the Raffaello multi-purpose logistics module packed with supplies and spare parts for the International Space Station. Atlantis also will fly the Robotic Refueling Mission experiment that will investigate the potential for robotically refueling existing satellites in orbit. In addition, Atlantis will return with a failed ammonia pump module to help NASA better understand the failure mechanism and improve pump designs for future systems. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information, visit www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Jeffrey Marino

CAPE CANAVERAL, Fla. -- At a slow pace of about 1 mph, space shuttle Atlantis makes its final journey from the Vehicle Assembly Building to Launch Pad 39A at NASA's Kennedy Space Center in Florida. First motion was at 8:42 p.m. EDT. It will take the crawler-transporter about six hours to carry the shuttle, attached to its external fuel tank and solid rocket boosters, to the seaside launch pad. The milestone move paves the way for the launch of the STS-135 mission to the International Space Station, targeted for July 8. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Troy Cryder

CAPE CANAVERAL, Fla. -- Bright xenon lights usher space shuttle Atlantis down a 3.4-mile stretch of river rocks as the vehicle embarks on its historic final journey from the Vehicle Assembly Building to Launch Pad 39A at NASA's Kennedy Space Center in Florida. "Rollout," as it's called, began at 8:42 p.m. EDT. It will take the crawler-transporter about six hours to carry Atlantis, attached to its external fuel tank and solid rocket boosters atop a mobile launcher platform, to the seaside launch pad. The milestone move paves the way for the launch of the STS-135 mission to the International Space Station, targeted for July 8. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. -- Taken from the Vehicle Assembly Building roof at NASA's Kennedy Space Center in Florida, this image shows the Press Site complex with a myriad of vehicles, satellite trucks and trailers belonging to invited guests and media for the launch of space shuttle Atlantis. Atlantis began its final flight, the STS-135 mission to the International Space Station, at 11:29 a.m. EDT on July 8. STS-135 will deliver the Raffaello multi-purpose logistics module packed with supplies and spare parts for the International Space Station. Atlantis also will fly the Robotic Refueling Mission experiment that will investigate the potential for robotically refueling existing satellites in orbit. In addition, Atlantis will return with a failed ammonia pump module to help NASA better understand the failure mechanism and improve pump designs for future systems. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information, visit www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Jeffrey Marino

CAPE CANAVERAL, Fla. -- Space shuttle Atlantis, attached to its external fuel tank and solid rocket boosters atop a mobile launcher platform, slowly inches out of the Vehicle Assembly Building for the final time. "Rollout," as it's called, to Launch Pad 39A at NASA's Kennedy Space Center in Florida began at 8:42 p.m. EDT. It will take the crawler-transporter about six hours to carry the shuttle stack to its seaside launch pad. The milestone move paves the way for the launch of the STS-135 mission to the International Space Station, targeted for July 8. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. -- STS-135 Commander Chris Ferguson and Pilot Doug Hurley perform touch-and-go landings on the Shuttle Landing Facility runway at NASA's Kennedy Space Center in Florida. The pilot and commander of every shuttle mission routinely practice landings aboard Shuttle Training Aircraft, which are Gulfstream II jets modified to mimic the shuttle's handling during the final phase of landing. The STS-135 flight crew of four arrived aboard T-38 training jets to watch two historic milestones of NASA's Space Shuttle Program -- the final landing of shuttle Endeavour, which will bookend its STS-134 mission to the International Space Station, and the final rollout of their vehicle, space shuttle Atlantis, to Launch Pad 39A. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of the shuttle program. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- Members of the media and employees gather near the countdown clock to see this rocket's red glare for the last time as space shuttle Atlantis roars off Launch Pad 39A at NASA's Kennedy Space Center in Florida at 11:29 a.m. EDT on July 8. On board are four experienced astronauts -- STS-135 Commander Chris Ferguson, Pilot Doug Hurley, and Mission Specialists Sandy Magnus and Rex Walheim. STS-135 will deliver the Raffaello multi-purpose logistics module packed with supplies and spare parts for the International Space Station. Atlantis also will fly the Robotic Refueling Mission experiment that will investigate the potential for robotically refueling existing satellites in orbit. In addition, Atlantis will return with a failed ammonia pump module to help NASA better understand the failure mechanism and improve pump designs for future systems. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information, visit www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. -- Media snap photos of space shuttle Atlantis, attached to its external fuel tank and solid rocket boosters atop a mobile launcher platform, for the final time in the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida. The shuttle is awaiting its final journey, known as "rollout," to Launch Pad 39A. The milestone move will pave the way for the launch of the STS-135 mission to the International Space Station, targeted for July 8. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. -- Space shuttle Atlantis, attached to its external fuel tank and solid rocket boosters atop a mobile launcher platform, awaits its final journey from the Vehicle Assembly Building to Launch Pad 39A at NASA's Kennedy Space Center in Florida. "Rollout," as it's called, began at 8:42 p.m. EDT. It will take the crawler-transporter about six hours to carry the shuttle stack to its seaside launch pad. The milestone move paves the way for the launch of the STS-135 mission to the International Space Station, targeted for July 8. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- Workers measured and marked in bright red the letters "MLG" at the spot where space shuttle Atlantis' main landing gear came to a stop after the vehicle's final return from space. Securing the space shuttle fleet's place in history on the STS-135 mission, Atlantis safely and successfully rounded out NASA's Space Shuttle Program on the Shuttle Landing Facility's Runway 15 at Kennedy Space Center in Florida. Main gear touchdown was at 5:57:00 a.m. EDT, followed by nose gear touchdown at 5:57:20 a.m., and wheelstop at 5:57:54 a.m. On the 37th shuttle mission to the International Space Station, STS-135 delivered more than 9,400 pounds of spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- Space shuttle Atlantis, attached to its external fuel tank and solid rocket boosters atop a mobile launcher platform, awaits its final journey from the Vehicle Assembly Building to Launch Pad 39A at NASA's Kennedy Space Center in Florida. "Rollout," as it's called, began at 8:42 p.m. EDT. It will take the crawler-transporter about six hours to carry the shuttle stack to its seaside launch pad. The milestone move paves the way for the launch of the STS-135 mission to the International Space Station, targeted for July 8. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- Bright xenon lights usher space shuttle Atlantis down a 3.4-mile stretch of river rocks as the vehicle embarks on its historic final journey from the Vehicle Assembly Building to Launch Pad 39A at NASA's Kennedy Space Center in Florida. "Rollout," as it's called, began at 8:42 p.m. EDT. It will take the crawler-transporter about six hours to carry Atlantis, attached to its external fuel tank and solid rocket boosters atop a mobile launcher platform, to the seaside launch pad. The milestone move paves the way for the launch of the STS-135 mission to the International Space Station, targeted for July 8. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. -- STS-135 Mission Specialist Sandy Magnus dons her launch-and-entry suit in the Operations and Checkout Building at NASA's Kennedy Space Center in Florida. Magnus is one of the final four astronauts to launch aboard a space shuttle. She has launched aboard a shuttle twice and most recently spent time aboard the International Space Station as an Expedition 18 crew member from November 2008 to March 2009. STS-135 is scheduled to lift off aboard space shuttle Atlantis at 11:26 a.m. EDT on July 8 for a mission to the International Space Station. STS-135 will deliver the Raffaello multi-purpose logistics module packed with supplies and spare parts for the orbiting outpost. Atlantis also will fly the Robotic Refueling Mission experiment that will investigate the potential for robotically refueling existing satellites in orbit. In addition, Atlantis will return with a failed ammonia pump module to help NASA better understand the failure mechanism and improve pump designs for future systems. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- STS-135 Commander Chris Ferguson, left, and Pilot Doug Hurley head out on the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida to practice touch-and-go landings aboard two Shuttle Training Aircraft. The flight crew of four arrived aboard T-38 training jets to watch two historic milestones of NASA's Space Shuttle Program -- the final landing of shuttle Endeavour, which will bookend its STS-134 mission to the International Space Station, and the final rollout of their vehicle, space shuttle Atlantis, to Launch Pad 39A. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of the shuttle program. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- Space shuttle Atlantis, attached to its external fuel tank and solid rocket boosters atop a mobile launcher platform, makes its final debut outside the Vehicle Assembly Building. "Rollout," as it's called, to Launch Pad 39A at NASA's Kennedy Space Center in Florida began at 8:42 p.m. EDT. It will take the crawler-transporter about six hours to carry the shuttle stack to its seaside launch pad. The milestone move paves the way for the launch of the STS-135 mission to the International Space Station, targeted for July 8. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- Space shuttle Atlantis, attached to its external fuel tank and solid rocket boosters atop a mobile launcher platform, slowly inches out of the Vehicle Assembly Building for the final time. "Rollout," as it's called, to Launch Pad 39A at NASA's Kennedy Space Center in Florida began at 8:42 p.m. EDT. It will take the crawler-transporter about six hours to carry the shuttle stack to its seaside launch pad. The milestone move paves the way for the launch of the STS-135 mission to the International Space Station, targeted for July 8. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. -- Space shuttle Atlantis, attached to its external fuel tank and solid rocket boosters atop a mobile launcher platform, slowly inches out of the Vehicle Assembly Building for the final time. "Rollout," as it's called, to Launch Pad 39A at NASA's Kennedy Space Center in Florida began at 8:42 p.m. EDT. It will take the crawler-transporter about six hours to carry the shuttle stack to its seaside launch pad. The milestone move paves the way for the launch of the STS-135 mission to the International Space Station, targeted for July 8. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- Ribbons of steam and smoke trail space shuttle Atlantis as it nears touch down on the Shuttle Landing Facility's Runway 15 at NASA's Kennedy Space Center in Florida for the final time. Securing the space shuttle fleet's place in history, Atlantis marked the 26th nighttime landing of NASA's Space Shuttle Program and the 78th landing at Kennedy. Main gear touchdown was at 5:57:00 a.m. EDT, followed by nose gear touchdown at 5:57:20 a.m., and wheelstop at 5:57:54 a.m. On board are STS-135 Commander Chris Ferguson, Pilot Doug Hurley, and Mission Specialists Sandra Magnus and Rex Walheim. On the 37th shuttle mission to the International Space Station, STS-135 delivered more than 9,400 pounds of spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- Space shuttle Atlantis' bright-white, iconic frame illuminates the darkness as it touches down on the Shuttle Landing Facility's Runway 15 at NASA's Kennedy Space Center in Florida for the final time. Securing the space shuttle fleet's place in history, Atlantis marked the 26th nighttime landing of NASA's Space Shuttle Program and the 78th landing at Kennedy. Main gear touchdown was at 5:57:00 a.m. EDT, followed by nose gear touchdown at 5:57:20 a.m., and wheelstop at 5:57:54 a.m. On board are STS-135 Commander Chris Ferguson, Pilot Doug Hurley, and Mission Specialists Sandra Magnus and Rex Walheim. On the 37th shuttle mission to the International Space Station, STS-135 delivered more than 9,400 pounds of spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Sandra Joseph

CAPE CANAVERAL, Fla. -- Space shuttle Atlantis' bright-white, iconic frame illuminates the darkness as it touches down on the Shuttle Landing Facility's Runway 15 at NASA's Kennedy Space Center in Florida for the final time. Securing the space shuttle fleet's place in history, Atlantis marked the 26th nighttime landing of NASA's Space Shuttle Program and the 78th landing at Kennedy. Main gear touchdown was at 5:57:00 a.m. EDT, followed by nose gear touchdown at 5:57:20 a.m., and wheelstop at 5:57:54 a.m. On board are STS-135 Commander Chris Ferguson, Pilot Doug Hurley, and Mission Specialists Sandra Magnus and Rex Walheim. On the 37th shuttle mission to the International Space Station, STS-135 delivered more than 9,400 pounds of spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Sandra Joseph

CAPE CANAVERAL, Fla. -- Taken from the Vehicle Assembly Building roof at NASA's Kennedy Space Center in Florida, this image shows the Turn Basin with a myriad of vehicles belonging to invited guests for the launch of space shuttle Atlantis. Atlantis began its final flight, the STS-135 mission to the International Space Station, at 11:29 a.m. EDT on July 8. STS-135 will deliver the Raffaello multi-purpose logistics module packed with supplies and spare parts for the International Space Station. Atlantis also will fly the Robotic Refueling Mission experiment that will investigate the potential for robotically refueling existing satellites in orbit. In addition, Atlantis will return with a failed ammonia pump module to help NASA better understand the failure mechanism and improve pump designs for future systems. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information, visit www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Jeffrey Marino

CAPE CANAVERAL, Fla. -- Xenons cast a halo of light on space shuttle Atlantis as the spacecraft approaches Runway 15 at NASA's Kennedy Space Center in Florida for the last time. Securing the space shuttle fleet's place in history, Atlantis marked the 26th nighttime landing of NASA's Space Shuttle Program and the 78th landing at Kennedy. Main gear touchdown was at 5:57:00 a.m. EDT, followed by nose gear touchdown at 5:57:20 a.m., and wheelstop at 5:57:54 a.m. On board are STS-135 Commander Chris Ferguson, Pilot Doug Hurley, and Mission Specialists Sandra Magnus and Rex Walheim. On the 37th shuttle mission to the International Space Station, STS-135 delivered more than 9,400 pounds of spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kevin O'Connell

CAPE CANAVERAL, Fla. -- United Space Allaince's Matt Gaetjens with the Astronaut Support Office, left, greets STS-135 Mission Specialist Rex Walheim and Commander Chris Ferguson on the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. The flight crew of four arrived aboard T-38 training jets to watch two historic milestones of NASA's Space Shuttle Program -- the final landing of shuttle Endeavour, which will bookend its STS-134 mission to the International Space Station, and the final rollout of their vehicle, space shuttle Atlantis, to Launch Pad 39A. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of the shuttle program. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- STS-135 Mission Specialist Rex Walheim waves as he dons his launch-and-entry suit and helmet in the Operations and Checkout Building at NASA's Kennedy Space Center in Florida. Walheim is one of the final four astronauts to launch aboard a space shuttle. All three of Walheim's missions -- STS-110, STS-122 and now STS-135 -- will have been aboard space shuttle Atlantis. STS-135 is scheduled to lift off aboard Atlantis at 11:26 a.m. EDT on July 8 for a mission to the International Space Station. STS-135 will deliver the Raffaello multi-purpose logistics module packed with supplies and spare parts for the orbiting outpost. Atlantis also will fly the Robotic Refueling Mission experiment that will investigate the potential for robotically refueling existing satellites in orbit. In addition, Atlantis will return with a failed ammonia pump module to help NASA better understand the failure mechanism and improve pump designs for future systems. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- Space shuttle Atlantis, attached to its external fuel tank and solid rocket boosters atop a mobile launcher platform, makes its final debut outside the Vehicle Assembly Building. "Rollout," as it's called, to Launch Pad 39A at NASA's Kennedy Space Center in Florida began at 8:42 p.m. EDT. It will take the crawler-transporter about six hours to carry the shuttle stack to its seaside launch pad. The milestone move paves the way for the launch of the STS-135 mission to the International Space Station, targeted for July 8. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- Bathed in xenon lights, space shuttle Atlantis embarks on its final journey from the Vehicle Assembly Building to Launch Pad 39A at NASA's Kennedy Space Center in Florida. First motion was at 8:42 p.m. EDT. It will take the crawler-transporter about six hours to carry the shuttle, attached to its external fuel tank and solid rocket boosters, to the seaside launch pad. The milestone move paves the way for the launch of the STS-135 mission to the International Space Station, targeted for July 8. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. -- Members of the media and employees gather near the countdown clock to see space shuttle Atlantis soar toward space after lifting off Launch Pad 39A at NASA's Kennedy Space Center in Florida at 11:29 a.m. EDT on July 8. On board are four experienced astronauts -- STS-135 Commander Chris Ferguson, Pilot Doug Hurley, and Mission Specialists Sandy Magnus and Rex Walheim. STS-135 will deliver the Raffaello multi-purpose logistics module packed with supplies and spare parts for the International Space Station. Atlantis also will fly the Robotic Refueling Mission experiment that will investigate the potential for robotically refueling existing satellites in orbit. In addition, Atlantis will return with a failed ammonia pump module to help NASA better understand the failure mechanism and improve pump designs for future systems. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information, visit www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. -- Space shuttle Atlantis, attached to its external fuel tank and solid rocket boosters atop a mobile launcher platform, slowly inches out of the Vehicle Assembly Building for the final time. "Rollout," as it's called, to Launch Pad 39A at NASA's Kennedy Space Center in Florida began at 8:42 p.m. EDT. It will take the crawler-transporter about six hours to carry the shuttle stack to its seaside launch pad. The milestone move paves the way for the launch of the STS-135 mission to the International Space Station, targeted for July 8. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. -- Space shuttle Atlantis, attached to its external fuel tank and solid rocket boosters atop a mobile launcher platform, awaits its final journey from the Vehicle Assembly Building to Launch Pad 39A at NASA's Kennedy Space Center in Florida. "Rollout," as it's called, began at 8:42 p.m. EDT. It will take the crawler-transporter about six hours to carry the shuttle stack to its seaside launch pad. The milestone move paves the way for the launch of the STS-135 mission to the International Space Station, targeted for July 8. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- Bathed in xenon lights, space shuttle Atlantis passes the Turn Basin as it makes its final journey from the Vehicle Assembly Building to Launch Pad 39A at NASA's Kennedy Space Center in Florida. First motion was at 8:42 p.m. EDT. It will take the crawler-transporter about six hours to carry the shuttle, attached to its external fuel tank and solid rocket boosters, to the seaside launch pad. The milestone move paves the way for the launch of the STS-135 mission to the International Space Station, targeted for July 8. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- Ribbons of steam and smoke trail space shuttle Atlantis as it nears touch down on the Shuttle Landing Facility's Runway 15 at NASA's Kennedy Space Center in Florida for the final time. Securing the space shuttle fleet's place in history, Atlantis marked the 26th nighttime landing of NASA's Space Shuttle Program and the 78th landing at Kennedy. Main gear touchdown was at 5:57:00 a.m. EDT, followed by nose gear touchdown at 5:57:20 a.m., and wheelstop at 5:57:54 a.m. On board are STS-135 Commander Chris Ferguson, Pilot Doug Hurley, and Mission Specialists Sandra Magnus and Rex Walheim. On the 37th shuttle mission to the International Space Station, STS-135 delivered more than 9,400 pounds of spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- Space shuttle Atlantis returns to Earth for the last time on Runway 15 at NASA's Kennedy Space Center in Florida just before sunrise. Atlantis touched down on Runway 15 at 5:57 a.m., bringing an end to the STS-135 mission and NASA's Space Shuttle Program. On the 37th shuttle mission to the International Space Station, STS-135 delivered more than 9,400 pounds of spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Tony Gray

CAPE CANAVERAL, Fla. -- Ribbons of steam and smoke trail space shuttle Atlantis as it touches down on the Shuttle Landing Facility's Runway 15 at NASA's Kennedy Space Center in Florida for the final time. Securing the space shuttle fleet's place in history, Atlantis marked the 26th nighttime landing of NASA's Space Shuttle Program and the 78th landing at Kennedy. Main gear touchdown was at 5:57:00 a.m. EDT, followed by nose gear touchdown at 5:57:20 a.m., and wheelstop at 5:57:54 a.m. On board are STS-135 Commander Chris Ferguson, Pilot Doug Hurley, and Mission Specialists Sandra Magnus and Rex Walheim. On the 37th shuttle mission to the International Space Station, STS-135 delivered more than 9,400 pounds of spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kevin O'Connell

CAPE CANAVERAL, Fla. -- Xenons light the way home for space shuttle Atlantis at NASA's Kennedy Space Center in Florida for the final time. Securing the space shuttle fleet's place in history, Atlantis marked the 26th nighttime landing of NASA's Space Shuttle Program and the 78th landing at Kennedy. Main gear touchdown on the Shuttle Landing Facility's Runway 15 was at 5:57:00 a.m. EDT, followed by nose gear touchdown at 5:57:20 a.m., and wheelstop at 5:57:54 a.m. On board are STS-135 Commander Chris Ferguson, Pilot Doug Hurley, and Mission Specialists Sandra Magnus and Rex Walheim. On the 37th shuttle mission to the International Space Station, STS-135 delivered more than 9,400 pounds of spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Sandra Joseph

CAPE CANAVERAL, Fla. -- Bright xenon lights usher space shuttle Atlantis down a 3.4-mile stretch of river rocks as the vehicle embarks on its historic final journey from the Vehicle Assembly Building to Launch Pad 39A at NASA's Kennedy Space Center in Florida. "Rollout," as it's called, began at 8:42 p.m. EDT. It will take the crawler-transporter about six hours to carry Atlantis, attached to its external fuel tank and solid rocket boosters atop a mobile launcher platform, to the seaside launch pad. The milestone move paves the way for the launch of the STS-135 mission to the International Space Station, targeted for July 8. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. -- Space shuttle Atlantis, attached to its external fuel tank and solid rocket boosters atop a mobile launcher platform, makes its final debut outside the Vehicle Assembly Building. "Rollout," as it's called, to Launch Pad 39A at NASA's Kennedy Space Center in Florida began at 8:42 p.m. EDT. It will take the crawler-transporter about six hours to carry the shuttle stack to its seaside launch pad. The milestone move paves the way for the launch of the STS-135 mission to the International Space Station, targeted for July 8. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. -- STS-135 Commander Chris Ferguson, left, and Mission Specialist Sandy Magnus are greeted on the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. The flight crew of four arrived aboard T-38 training jets to watch two historic milestones of NASA's Space Shuttle Program -- the final landing of shuttle Endeavour, which will bookend its STS-134 mission to the International Space Station, and the final rollout of their vehicle, space shuttle Atlantis, to Launch Pad 39A. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of the shuttle program. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- STS-135 Commander Chris Ferguson straps into a Shuttle Training Aircraft to practice touch-and-go landings on the Shuttle Landing Facility runway at NASA's Kennedy Space Center in Florida. The flight crew of four arrived aboard T-38 training jets to watch two historic milestones of NASA's Space Shuttle Program -- the final landing of shuttle Endeavour, which will bookend its STS-134 mission to the International Space Station, and the final rollout of their vehicle, space shuttle Atlantis, to Launch Pad 39A. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of the shuttle program. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- Xenon lights illuminate space shuttle Atlantis' unfurled drag chute as the vehicle rolls to a stop on the Shuttle Landing Facility's Runway 15 at NASA's Kennedy Space Center in Florida for the final. Securing the space shuttle fleet's place in history, Atlantis marked the 26th nighttime landing of NASA's Space Shuttle Program and the 78th landing at Kennedy. Main gear touchdown was at 5:57:00 a.m. EDT, followed by nose gear touchdown at 5:57:20 a.m., and wheelstop at 5:57:54 a.m. On board are STS-135 Commander Chris Ferguson, Pilot Doug Hurley, and Mission Specialists Sandra Magnus and Rex Walheim. On the 37th shuttle mission to the International Space Station, STS-135 delivered more than 9,400 pounds of spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. -- Thousands of spectators came out to watch space shuttle Atlantis' historic final journey from the Vehicle Assembly Building to Launch Pad 39A at NASA's Kennedy Space Center in Florida. First motion was at 8:42 p.m. EDT. It will take the crawler-transporter about six hours to carry the shuttle, attached to its external fuel tank and solid rocket boosters, to the seaside launch pad. The milestone move paves the way for the launch of the STS-135 mission to the International Space Station, targeted for July 8. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- Ribbons of steam and smoke trail space shuttle Atlantis as it touches down on the Shuttle Landing Facility's Runway 15 at NASA's Kennedy Space Center in Florida for the final time. Securing the space shuttle fleet's place in history, Atlantis marked the 26th nighttime landing of NASA's Space Shuttle Program and the 78th landing at Kennedy. Main gear touchdown was at 5:57:00 a.m. EDT, followed by nose gear touchdown at 5:57:20 a.m., and wheelstop at 5:57:54 a.m. On board are STS-135 Commander Chris Ferguson, Pilot Doug Hurley, and Mission Specialists Sandra Magnus and Rex Walheim. On the 37th shuttle mission to the International Space Station, STS-135 delivered more than 9,400 pounds of spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Linda Perry

CAPE CANAVERAL, Fla. -- Dressed in their bright-orange launch-and-entry suits, the final four astronauts to launch aboard a space shuttle wave to media and employees cheering them on in front of the Astronaut Crew Quarters in the Operations and Checkout Building at NASA's Kennedy Space Center in Florida. From left, are STS-135 Mission Specialists Rex Walheim and Sandy Magnus, Pilot Doug Hurley, and Commander Chris Ferguson. The silver Astrovan will take the astronauts to Launch Pad 39A, where they will board space shuttle Atlantis for a scheduled liftoff at 11:26 a.m. EDT on July 8 for their mission to the International Space Station. STS-135 will deliver the Raffaello multi-purpose logistics module packed with supplies and spare parts for the orbiting outpost. Atlantis also will fly the Robotic Refueling Mission experiment that will investigate the potential for robotically refueling existing satellites in orbit. In addition, Atlantis will return with a failed ammonia pump module to help NASA better understand the failure mechanism and improve pump designs for future systems. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information, visit www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- Space shuttle Atlantis makes its historic final journey from the Vehicle Assembly Building to Launch Pad 39A at NASA's Kennedy Space Center in Florida while the flags of America and shuttle Endeavour wave proudly in a light breeze. First motion was at 8:42 p.m. EDT. The milestone move, known as "rollout," paves the way for the launch of the STS-135 mission to the International Space Station, targeted for July 8. Atlantis is slated to arrive at its seaside launch pad about an hour after Endeavour lands on Kennedy's Shuttle Landing Facility runway for the last time, bringing an end to the STS-134 mission. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Gianni Woods

CAPE CANAVERAL, Fla. -- Bright xenon lights greet space shuttle Atlantis as the vehicle makes its final debut outside the Vehicle Assembly Building. "Rollout," as it's called, to Launch Pad 39A at NASA's Kennedy Space Center in Florida began at 8:42 p.m. EDT. It will take the crawler-transporter about six hours to carry the shuttle, attached to its external fuel tank and solid rocket boosters atop a mobile launcher platform, to its seaside launch pad. The milestone move paves the way for the launch of the STS-135 mission to the International Space Station, targeted for July 8. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. -- STS-135 Commander Chris Ferguson, left, Pilot Doug Hurley, and Mission Specialists Sandy Magnus and Rex Walheim talk to media as their vehicle, space shuttle Atlantis, makes its final journey from the Vehicle Assembly Building to Launch Pad 39A at NASA's Kennedy Space Center in Florida. First motion was at 8:42 p.m. EDT. It will take the crawler-transporter about six hours to carry the shuttle, attached to its external fuel tank and solid rocket boosters, to the seaside launch pad. The milestone move paves the way for the launch of the STS-135 mission to the International Space Station, targeted for July 8. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Troy Cryder

CAPE CANAVERAL, Fla. -- Dressed in their bright-orange launch-and-entry suits, the final four astronauts to launch aboard a space shuttle exit the Astronaut Crew Quarters in the Operations and Checkout Building at NASA's Kennedy Space Center in Florida. STS-135 Commander Chris Ferguson is followed by Pilot Doug Hurley and Mission Specialists Rex Walheim and Sandy Magnus. The astronauts, who will head to Launch Pad 39A aboard the silver Astrovan, are scheduled to lift off aboard space shuttle Atlantis at 11:26 a.m. EDT on July 8 for their mission to the International Space Station. STS-135 will deliver the Raffaello multi-purpose logistics module packed with supplies and spare parts for the orbiting outpost. Atlantis also will fly the Robotic Refueling Mission experiment that will investigate the potential for robotically refueling existing satellites in orbit. In addition, Atlantis will return with a failed ammonia pump module to help NASA better understand the failure mechanism and improve pump designs for future systems. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information, visit www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- Thousands of spectators gather to watch space shuttle Atlantis' historic final journey from the Vehicle Assembly Building to Launch Pad 39A at NASA's Kennedy Space Center in Florida. First motion was at 8:42 p.m. EDT. It will take the crawler-transporter about six hours to carry the shuttle, attached to its external fuel tank and solid rocket boosters, to the seaside launch pad. The milestone move paves the way for the launch of the STS-135 mission to the International Space Station, targeted for July 8. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Gianni Woods

CAPE CANAVERAL, Fla. -- Taken from the Vehicle Assembly Building roof at NASA's Kennedy Space Center in Florida, this image shows the Press Site complex with a myriad of vehicles, satellite trucks and trailers belonging to invited guests and media for the launch of space shuttle Atlantis. Atlantis began its final flight, the STS-135 mission to the International Space Station, at 11:29 a.m. EDT on July 8. STS-135 will deliver the Raffaello multi-purpose logistics module packed with supplies and spare parts for the International Space Station. Atlantis also will fly the Robotic Refueling Mission experiment that will investigate the potential for robotically refueling existing satellites in orbit. In addition, Atlantis will return with a failed ammonia pump module to help NASA better understand the failure mechanism and improve pump designs for future systems. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information, visit www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Jeffrey Marino

CAPE CANAVERAL, Fla. -- Ribbons of steam and smoke trail space shuttle Atlantis as it touches down on the Shuttle Landing Facility's Runway 15 at NASA's Kennedy Space Center in Florida for the final time. Securing the space shuttle fleet's place in history, Atlantis marked the 26th nighttime landing of NASA's Space Shuttle Program and the 78th landing at Kennedy. Main gear touchdown was at 5:57:00 a.m. EDT, followed by nose gear touchdown at 5:57:20 a.m., and wheelstop at 5:57:54 a.m. On board are STS-135 Commander Chris Ferguson, Pilot Doug Hurley, and Mission Specialists Sandra Magnus and Rex Walheim. On the 37th shuttle mission to the International Space Station, STS-135 delivered more than 9,400 pounds of spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kevin O'Connell

CAPE CANAVERAL, Fla. -- STS-135 Commander Chris Ferguson, left, Pilot Doug Hurley, and Mission Specialists Sandy Magnus and Rex Walheim talk to media as their vehicle, space shuttle Atlantis, makes its final journey from the Vehicle Assembly Building to Launch Pad 39A at NASA's Kennedy Space Center in Florida. First motion was at 8:42 p.m. EDT. It will take the crawler-transporter about six hours to carry the shuttle, attached to its external fuel tank and solid rocket boosters, to the seaside launch pad. The milestone move paves the way for the launch of the STS-135 mission to the International Space Station, targeted for July 8. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Troy Cryder

CAPE CANAVERAL, Fla. -- The final astronaut to board a space shuttle for flight, STS-135 Mission Specialist Rex Walheim, bids farewell to the Closeout Crew in the White Room of Launch Pad 39A. All three of Walheim's missions -- STS-110, STS-122 and now STS-135 -- will have been aboard space shuttle Atlantis. Four STS-135 crew members are scheduled to lift off at 11:26 a.m. EDT on July 8 for a mission to the International Space Station. STS-135 will deliver the Raffaello multi-purpose logistics module packed with supplies and spare parts for the International Space Station. Atlantis also will fly the Robotic Refueling Mission experiment that will investigate the potential for robotically refueling existing satellites in orbit. In addition, Atlantis will return with a failed ammonia pump module to help NASA better understand the failure mechanism and improve pump designs for future systems. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information, visit www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Sandra Joseph and Kevin O'Connell

CAPE CANAVERAL, Fla. -- The final four astronauts to launch aboard a space shuttle await breakfast in their Astronaut Crew Quarters in the Operations and Checkout Building at NASA's Kennedy Space Center in Florida. From left, are STS-135 Mission Specialist Rex Walheim, Pilot Doug Hurley, Commander Chris Ferguson, and Mission Specialist Sandy Magnus. The astronauts are scheduled to lift off aboard space shuttle Atlantis at 11:26 a.m. EDT on July 8 for their mission to the International Space Station. STS-135 will deliver the Raffaello multi-purpose logistics module packed with supplies and spare parts for the orbiting outpost. Atlantis also will fly the Robotic Refueling Mission experiment that will investigate the potential for robotically refueling existing satellites in orbit. In addition, Atlantis will return with a failed ammonia pump module to help NASA better understand the failure mechanism and improve pump designs for future systems. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- Workers measured and marked in bright green the letters "NLG" at the spot where space shuttle Atlantis' nose landing gear came to a stop after the vehicle's final return from space. Securing the space shuttle fleet's place in history on the STS-135 mission, Atlantis safely and successfully rounded out NASA's Space Shuttle Program on the Shuttle Landing Facility's Runway 15 at Kennedy Space Center in Florida. Main gear touchdown was at 5:57:00 a.m. EDT, followed by nose gear touchdown at 5:57:20 a.m., and wheelstop at 5:57:54 a.m. On the 37th shuttle mission to the International Space Station, STS-135 delivered more than 9,400 pounds of spare parts, equipment and supplies in the Raffaello multi-purpose logistics module that will sustain station operations for the next year. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- Members of the media and employees gather near the countdown clock to see this rocket's red glare for the last time as space shuttle Atlantis roars off Launch Pad 39A at NASA's Kennedy Space Center in Florida at 11:29 a.m. EDT on July 8. On board are four experienced astronauts -- STS-135 Commander Chris Ferguson, Pilot Doug Hurley, and Mission Specialists Sandy Magnus and Rex Walheim. STS-135 will deliver the Raffaello multi-purpose logistics module packed with supplies and spare parts for the International Space Station. Atlantis also will fly the Robotic Refueling Mission experiment that will investigate the potential for robotically refueling existing satellites in orbit. In addition, Atlantis will return with a failed ammonia pump module to help NASA better understand the failure mechanism and improve pump designs for future systems. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information, visit www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. -- The STS-135 crew members talk to media as their vehicle, space shuttle Atlantis, makes its final journey from the Vehicle Assembly Building to Launch Pad 39A at NASA's Kennedy Space Center in Florida. First motion was at 8:42 p.m. EDT. It will take the crawler-transporter about six hours to carry the shuttle, attached to its external fuel tank and solid rocket boosters, to the seaside launch pad. The milestone move paves the way for the launch of the STS-135 mission to the International Space Station, targeted for July 8. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Troy Cryder

CAPE CANAVERAL, Fla. -- The Closeout Crew helps STS-135 Commander Chris Ferguson prepare to enter space shuttle Atlantis from the White Room of Launch Pad 39A at NASA's Kennedy Space Center in Florida. Ferguson is one of the final four astronauts to launch aboard a space shuttle. He is a retired U.S. Navy captain who already has logged nearly a month in space during two previous shuttle flights. STS-135 is scheduled to lift off at 11:26 a.m. EDT on July 8 for a mission to the International Space Station. STS-135 will deliver the Raffaello multi-purpose logistics module packed with supplies and spare parts for the International Space Station. Atlantis also will fly the Robotic Refueling Mission experiment that will investigate the potential for robotically refueling existing satellites in orbit. In addition, Atlantis will return with a failed ammonia pump module to help NASA better understand the failure mechanism and improve pump designs for future systems. STS-135 will be the 33rd flight of Atlantis, the 37th shuttle mission to the space station, and the 135th and final mission of NASA's Space Shuttle Program. For more information, visit www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Sandra Joseph and Kevin O'Connell