CAPE CANAVERAL, Fla. -- Kennedy employees hold up a "We're Behind You, Atlantis" banner after shuttle Atlantis' move, or rollover, to the Vehicle Assembly Building (VAB) at NASA's Kennedy Space Center in Florida. The move called "rollover" is a major milestone in processing for the STS-135 mission to the International Space Station. Inside the VAB, the shuttle will be attached to its external fuel tank and solid rocket boosters. Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim are targeted to launch in early July, taking with them the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing spacecraft and return 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/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. -- Shuttle Atlantis makes its final planned move, or rollover, into the Vehicle Assembly Building (VAB) from Orbiter Processing Facility-1 at NASA's Kennedy Space Center in Florida. The move called "rollover" is a major milestone in processing for the STS-135 mission to the International Space Station. Inside the VAB, the shuttle will be attached to its external fuel tank and solid rocket boosters. Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim are targeted to launch in early July, taking with them the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing spacecraft and return 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/Dimitri Gerondidakis

Cape Canaveral, Fla. -- Media and Kennedy employees snap photos of shuttle Atlantis as it makes its final planned move to the Vehicle Assembly Building (VAB) from Orbiter Processing Facility-1 at NASA's Kennedy Space Center in Florida. The move called "rollover" is a major milestone in processing for the STS-135 mission to the International Space Station. Inside the VAB, the shuttle will be attached to its external fuel tank and solid rocket boosters. Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim are targeted to launch in early July, taking with them the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing spacecraft and return 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/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. -- Shuttle Atlantis makes its final planned move, or rollover, into the Vehicle Assembly Building (VAB) from Orbiter Processing Facility-1 at NASA's Kennedy Space Center in Florida. The move called "rollover" is a major milestone in processing for the STS-135 mission to the International Space Station. Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim are targeted to launch in early July, taking with them the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing spacecraft and return a failed ammonia nfor 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/Frankie Martin

CAPE CANAVERAL, Fla. -- Kennedy Center Director Bob Cabana (right) speaks with STS-135 crew members and Kennedy employees while watching shuttle Atlantis' rollover from Orbiter Processing Facility-1 to the Vehicle Assembly Building (VAB) at NASA's Kennedy Space Center in Florida. From left are STS-135 Mission Specialist Rex Walheim, Pilot Doug Hurley, Mission Specialist Sandra Magnus and Commander Chris Ferguson. The move called "rollover" is a major milestone in processing for the STS-135 mission to the International Space Station. Inside the VAB, the shuttle will be attached to its external fuel tank and solid rocket boosters. Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim are expected to launch in mid July, taking with them the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing spacecraft and return 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/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. - In Orbiter Processing Facility-1 at NASA's Kennedy Space Center in Florida, workers install and test the hydraulic system that will lift the shuttle Atlantis off the floor to enable the orbiter transport system, or OTS, to be rolled underneath for its move, or "rollover," to the Vehicle Assembly Building. Once there Atlantis will be joined with the external fuel tank and solid rocket boosters on the mobile launcher platform. Atlantis is being prepared for the STS-135 mission, which will deliver the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts to the International Space Station. STS-135 is targeted to launch June 28, and will be the last spaceflight for the Space Shuttle Program. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. - In Orbiter Processing Facility-1 at NASA's Kennedy Space Center in Florida, a worker checks the hydraulic system that has lifted shuttle Atlantis off the floor to enable the orbiter transport system, or OTS, to be rolled underneath for its move, or "rollover," to the Vehicle Assembly Building. Once there Atlantis will be joined with the external fuel tank and solid rocket boosters on the mobile launcher platform. Atlantis is being prepared for the STS-135 mission, which will deliver the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts to the International Space Station. STS-135 is targeted to launch June 28, and will be the last spaceflight for the Space Shuttle Program. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. - In Orbiter Processing Facility-1 at NASA's Kennedy Space Center in Florida, a worker checks the hydraulic system that has lifted shuttle Atlantis off the floor to enable the orbiter transport system, or OTS, to be rolled underneath for its move, or "rollover," to the Vehicle Assembly Building. Once there Atlantis will be joined with the external fuel tank and solid rocket boosters on the mobile launcher platform. Atlantis is being prepared for the STS-135 mission, which will deliver the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts to the International Space Station. STS-135 is targeted to launch June 28, and will be the last spaceflight for the Space Shuttle Program. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. - In Orbiter Processing Facility-1 at NASA's Kennedy Space Center in Florida, a worker tests the hydraulic system that will lift the shuttle Atlantis off the floor to enable the orbiter transport system, or OTS, to be rolled underneath for its move, or "rollover," to the Vehicle Assembly Building. Once there Atlantis will be joined with the external fuel tank and solid rocket boosters on the mobile launcher platform. Atlantis is being prepared for the STS-135 mission, which will deliver the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts to the International Space Station. STS-135 is targeted to launch June 28, and will be the last spaceflight for the Space Shuttle Program. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. - In Orbiter Processing Facility-1 at NASA's Kennedy Space Center in Florida, a hydraulic system has lifted shuttle Atlantis off the floor to enable the orbiter transport system, or OTS, to be rolled underneath for its move, or "rollover," to the Vehicle Assembly Building. Once there Atlantis will be joined with the external fuel tank and solid rocket boosters on the mobile launcher platform. Atlantis is being prepared for the STS-135 mission, which will deliver the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts to the International Space Station. STS-135 is targeted to launch June 28, and will be the last spaceflight for the Space Shuttle Program. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. - In Orbiter Processing Facility-1 at NASA's Kennedy Space Center in Florida, workers test the hydraulic system that will lift the shuttle Atlantis off the floor to enable the orbiter transport system, or OTS, to be rolled underneath for its move, or "rollover," to the Vehicle Assembly Building. Once there Atlantis will be joined with the external fuel tank and solid rocket boosters on the mobile launcher platform. Atlantis is being prepared for the STS-135 mission, which will deliver the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts to the International Space Station. STS-135 is targeted to launch June 28, and will be the last spaceflight for the Space Shuttle Program. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. - In Orbiter Processing Facility-1 at NASA's Kennedy Space Center in Florida, shuttle Atlantis' landing gear is being pressure tested for weight-bearing loads in preparation of it move, or "rollover," to the Vehicle Assembly Building where it will be joined with the external fuel tank and solid rocket boosters on the mobile launcher platform. Atlantis is being prepared for the STS-135 mission, which will deliver the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts to the International Space Station. STS-135 is targeted to launch June 28, and will be the last spaceflight for the Space Shuttle Program. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. -- In Orbiter Processing Facility-1 at NASA's Kennedy Space Center in Florida, STS-135 Pilot Doug Hurley is on hand to watch Atlantis' rollover from Orbiter Processing Facility-1 to the Vehicle Assembly Building (VAB) at NASA's Kennedy Space Center in Florida. The move called "rollover" is a major milestone in processing for the STS-135 mission to the International Space Station. Inside the VAB, the shuttle will be attached to its external fuel tank and solid rocket boosters. Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim are targeted to launch in early July, taking with them the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing spacecraft and return 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/Frankie Martin

CAPE CANAVERAL, Fla. -- Kennedy employees gather to watch shuttle Atlantis' rollover from Orbiter Processing Facility-1 to the Vehicle Assembly Building (VAB) at NASA's Kennedy Space Center in Florida. In this image are three of the STS-135 crew members; Pilot Doug Hurley (left), Mission Specialist Rex Walheim and Commander Chris Ferguson. The move called "rollover" is a major milestone in processing for the STS-135 mission to the International Space Station. Inside the VAB, the shuttle will be attached to its external fuel tank and solid rocket boosters. Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim are expected to launch in mid July, taking with them the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing spacecraft and return 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/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. -- STS-135 Commander Chris Ferguson, Mission Specialists Sandra Magnus and Rex Walheim, and Pilot Doug Hurley pause for a photo while watching Atlantis' rollover from Orbiter Processing Facility-1 to the Vehicle Assembly Building (VAB) at NASA's Kennedy Space Center in Florida. The move called "rollover" is a major milestone in processing for the STS-135 mission to the International Space Station. Inside the VAB, the shuttle will be attached to its external fuel tank and solid rocket boosters. Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim are targeted to launch in early July, taking with them the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing spacecraft and return 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/Frankie Martin

CAPE CANAVERAL, Fla. -- STS-135 Mission Specialists Sandra Magnus and Rex Walheim, pause for a photo while watching shuttle Atlantis' rollover from Orbiter Processing Facility-1 to the Vehicle Assembly Building (VAB) at NASA's Kennedy Space Center in Florida. The move called "rollover" is a major milestone in processing for the STS-135 mission to the International Space Station. Inside the VAB, the shuttle will be attached to its external fuel tank and solid rocket boosters. Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim are expected to launch in mid July, taking with them the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing spacecraft and return 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/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. -- STS-135 Commander Chris Ferguson (left), Mission Specialists Sandra Magnus and Rex Walheim, and Pilot Doug Hurley pause for a photo while watching shuttle Atlantis' rollover from Orbiter Processing Facility-1 to the Vehicle Assembly Building (VAB) at NASA's Kennedy Space Center in Florida. The move called "rollover" is a major milestone in processing for the STS-135 mission to the International Space Station. Inside the VAB, the shuttle will be attached to its external fuel tank and solid rocket boosters. Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim are expected to launch in mid July, taking with them the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing spacecraft and return 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/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. -- Kennedy employees hold up a "We're Behind You, Atlantis" banner after shuttle Atlantis' move, or rollover, to the Vehicle Assembly Building (VAB) at NASA's Kennedy Space Center in Florida. The move called "rollover" is a major milestone in processing for the STS-135 mission to the International Space Station. Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim are targeted to launch in early July, taking with them the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing spacecraft and return a failed ammonia nfor 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/Frankie Martin

CAPE CANAVERAL, Fla. -- Shuttle Atlantis makes its final planned move, or rollover, into the Vehicle Assembly Building (VAB) from Orbiter Processing Facility-1 at NASA's Kennedy Space Center in Florida. The move called "rollover" is a major milestone in processing for the STS-135 mission to the International Space Station. Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim are expected to launch mid July, taking with them the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing spacecraft and return 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/Jack Pfaller

CAPE CANAVERAL, Fla. -- Shuttle Atlantis makes its final planned move, or rollover, into the Vehicle Assembly Building (VAB) from Orbiter Processing Facility-1 at NASA's Kennedy Space Center in Florida. The move called "rollover" is a major milestone in processing for the STS-135 mission to the International Space Station. Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim are expected to launch mid July, taking with them the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing spacecraft and return 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/Jack Pfaller

CAPE CANAVERAL, Fla. -- Shuttle Atlantis makes its final planned move, or rollover, into the Vehicle Assembly Building (VAB) from Orbiter Processing Facility-1 at NASA's Kennedy Space Center in Florida. The move called "rollover" is a major milestone in processing for the STS-135 mission to the International Space Station. Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim are expected to launch mid July, taking with them the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing spacecraft and return 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/Jack Pfaller

CAPE CANAVERAL, Fla. -- In Orbiter Processing Facility-1 at NASA's Kennedy Space Center in Florida, workers guide the Orbiter Transporter System (OTS) under shuttle Atlantis for its move, or rollover, to the nearby Vehicle Assembly Building (VAB). Once inside the VAB, Atlantis will be joined to its solid rocket boosters and external fuel tank on the mobile launcher platform. Later this month, Atlantis is scheduled to "rollout" to Launch Pad 39A on the STS-135 mission, which will deliver the Raffaello multi-purpose logistics module packed with supplies and spare parts to the International Space Station. STS-135, targeted to launch June 28, will be the 33rd flight of Atlantis, the 37th shuttle mission to the 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. NASA/Jack Pfaller

CAPE CANAVERAL, Fla. -- Workers prepare to attach an exhaust hose to the Orbiter Transporter System (OTS) at Orbiter Processing Facility-1 at NASA's Kennedy Space Center in Florida. The OTS is being moved under shuttle Atlantis for its rollover to the nearby Vehicle Assembly Building (VAB). Once inside the VAB, Atlantis will be joined to its solid rocket boosters and external fuel tank on the mobile launcher platform. Later this month, Atlantis is scheduled to "rollout" to Launch Pad 39A on the STS-135 mission, which will deliver the Raffaello multi-purpose logistics module packed with supplies and spare parts to the International Space Station. STS-135, targeted to launch June 28, will be the 33rd flight of Atlantis, the 37th shuttle mission to the 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. NASA/Jack Pfaller

CAPE CANAVERAL, Fla. - In Orbiter Processing Facility-1 at NASA's Kennedy Space Center in Florida, workers check out the positioning of the Orbiter Transporter System (OTS) moved under shuttle Atlantis for its rollover to the nearby Vehicle Assembly Building (VAB). Once inside the VAB, Atlantis will be joined to its solid rocket boosters and external fuel tank on the mobile launcher platform. Later this month, Atlantis is scheduled to "rollout" to Launch Pad 39A on the STS-135 mission, which will deliver the Raffaello multi-purpose logistics module packed with supplies and spare parts to the International Space Station. STS-135, targeted to launch June 28, will be the 33rd flight of Atlantis, the 37th shuttle mission to the 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. NASA/Jack Pfaller

CAPE CANAVERAL, Fla. - Workers move the Orbiter Transporter System (OTS) into Orbiter Processing Facility-1 at NASA's Kennedy Space Center in Florida. The OTS will be moved under shuttle Atlantis for its rollover to the nearby Vehicle Assembly Building (VAB). Once inside the VAB, Atlantis will be joined to its solid rocket boosters and external fuel tank on the mobile launcher platform. Later this month, Atlantis is scheduled to "rollout" to Launch Pad 39A on the STS-135 mission, which will deliver the Raffaello multi-purpose logistics module packed with supplies and spare parts to the International Space Station. STS-135, targeted to launch June 28, will be the 33rd flight of Atlantis, the 37th shuttle mission to the 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. NASA/Jack Pfaller

CAPE CANAVERAL, Fla. -- In Orbiter Processing Facility-1 at NASA's Kennedy Space Center in Florida, workers guide the Orbiter Transporter System (OTS) under shuttle Atlantis for its move, or rollover, to the nearby Vehicle Assembly Building (VAB). Once inside the VAB, Atlantis will be joined to its solid rocket boosters and external fuel tank on the mobile launcher platform. Later this month, Atlantis is scheduled to "rollout" to Launch Pad 39A on the STS-135 mission, which will deliver the Raffaello multi-purpose logistics module packed with supplies and spare parts to the International Space Station. STS-135, targeted to launch June 28, will be the 33rd flight of Atlantis, the 37th shuttle mission to the 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. NASA/Jack Pfaller

CAPE CANAVERAL, Fla. -- In Orbiter Processing Facility-1 at NASA's Kennedy Space Center in Florida, workers guide the Orbiter Transporter System (OTS) under shuttle Atlantis for its move, or rollover, to the nearby Vehicle Assembly Building (VAB). Once inside the VAB, Atlantis will be joined to its solid rocket boosters and external fuel tank on the mobile launcher platform. Later this month, Atlantis is scheduled to "rollout" to Launch Pad 39A on the STS-135 mission, which will deliver the Raffaello multi-purpose logistics module packed with supplies and spare parts to the International Space Station. STS-135, targeted to launch June 28, will be the 33rd flight of Atlantis, the 37th shuttle mission to the 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. NASA/Jack Pfaller

CAPE CANAVERAL, Fla. -- In Orbiter Processing Facility-1 at NASA's Kennedy Space Center in Florida, workers guide the Orbiter Transporter System (OTS) under shuttle Atlantis for its move, or rollover to the nearby Vehicle Assembly Building (VAB). Once inside the VAB, Atlantis will be joined to its solid rocket boosters and external fuel tank on the mobile launcher platform. Later this month, Atlantis is scheduled to "rollout" to Launch Pad 39A on the STS-135 mission, which will deliver the Raffaello multi-purpose logistics module packed with supplies and spare parts to the International Space Station. STS-135, targeted to launch June 28, will be the 33rd flight of Atlantis, the 37th shuttle mission to the 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. NASA/Jack Pfaller

CAPE CANAVERAL, Fla. -- In Orbiter Processing Facility-1 at NASA's Kennedy Space Center in Florida, workers secure the Orbiter Transporter System (OTS) to shuttle Atlantis for its move, or rollover, to the nearby Vehicle Assembly Building (VAB). Once inside the VAB, Atlantis will be joined to its solid rocket boosters and external fuel tank on the mobile launcher platform. Later this month, Atlantis is scheduled to "rollout" to Launch Pad 39A on the STS-135 mission, which will deliver the Raffaello multi-purpose logistics module packed with supplies and spare parts to the International Space Station. STS-135, targeted to launch June 28, will be the 33rd flight of Atlantis, the 37th shuttle mission to the 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. NASA/Jack Pfaller

CAPE CANAVERAL, Fla. -- In Orbiter Processing Facility-1 at NASA's Kennedy Space Center in Florida, workers guide the Orbiter Transporter System (OTS) under shuttle Atlantis for its move, or rollover, to the nearby Vehicle Assembly Building (VAB). Once inside the VAB, Atlantis will be joined to its solid rocket boosters and external fuel tank on the mobile launcher platform. Later this month, Atlantis is scheduled to "rollout" to Launch Pad 39A on the STS-135 mission, which will deliver the Raffaello multi-purpose logistics module packed with supplies and spare parts to the International Space Station. STS-135, targeted to launch June 28, will be the 33rd flight of Atlantis, the 37th shuttle mission to the 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. NASA/Jack Pfaller

CAPE CANAVERAL, Fla. - In Orbiter Processing Facility-1 at NASA's Kennedy Space Center in Florida, workers guide the Orbiter Transporter System (OTS) under shuttle Atlantis for its move, or rollover, to the nearby Vehicle Assembly Building (VAB). Once inside the VAB, Atlantis will be joined to its solid rocket boosters and external fuel tank on the mobile launcher platform. Later this month, Atlantis is scheduled to "rollout" to Launch Pad 39A on the STS-135 mission, which will deliver the Raffaello multi-purpose logistics module packed with supplies and spare parts to the International Space Station. STS-135, targeted to launch June 28, will be the 33rd flight of Atlantis, the 37th shuttle mission to the 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. NASA/Jack Pfaller

CAPE CANAVERAL, Fla. -- In Orbiter Processing Facility-1 at NASA's Kennedy Space Center in Florida, workers guide the Orbiter Transporter System (OTS) under shuttle Atlantis for its move, or rollover to the nearby Vehicle Assembly Building (VAB). Once inside the VAB, Atlantis will be joined to its solid rocket boosters and external fuel tank on the mobile launcher platform. Later this month, Atlantis is scheduled to "rollout" to Launch Pad 39A on the STS-135 mission, which will deliver the Raffaello multi-purpose logistics module packed with supplies and spare parts to the International Space Station. STS-135, targeted to launch June 28, will be the 33rd flight of Atlantis, the 37th shuttle mission to the 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. NASA/Jack Pfaller

CAPE CANAVERAL, Fla. -- In Orbiter Processing Facility-1 at NASA's Kennedy Space Center in Florida, workers guide the Orbiter Transporter System (OTS) under shuttle Atlantis for its move, or rollover, to the nearby Vehicle Assembly Building (VAB). Once inside the VAB, Atlantis will be joined to its solid rocket boosters and external fuel tank on the mobile launcher platform. Later this month, Atlantis is scheduled to "rollout" to Launch Pad 39A on the STS-135 mission, which will deliver the Raffaello multi-purpose logistics module packed with supplies and spare parts to the International Space Station. STS-135, targeted to launch June 28, will be the 33rd flight of Atlantis, the 37th shuttle mission to the 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. NASA/Jack Pfaller

CAPE CANAVERAL, Fla. -- Workers attach an exhaust hose to the Orbiter Transporter System (OTS) at Orbiter Processing Facility-1 at NASA's Kennedy Space Center in Florida. The OTS is being moved under shuttle Atlantis for its rollover to the nearby Vehicle Assembly Building (VAB). Once inside the VAB, Atlantis will be joined to its solid rocket boosters and external fuel tank on the mobile launcher platform. Later this month, Atlantis is scheduled to "rollout" to Launch Pad 39A on the STS-135 mission, which will deliver the Raffaello multi-purpose logistics module packed with supplies and spare parts to the International Space Station. STS-135, targeted to launch June 28, will be the 33rd flight of Atlantis, the 37th shuttle mission to the 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. NASA/Jack Pfaller

CAPE CANAVERAL, Fla. - In the Vehicle Assembly Building (VAB) at NASA's Kennedy Space Center in Florida, workers monitor the progress of external fuel tank, ET-138, for space shuttle Atlantis' STS-135 mission, as it is lifted from its test cell for transfer to high bay-1 for joining with the twin solid rocket boosters on the mobile launcher platform. Shuttle Atlantis' move, or "rollover," from Orbiter Processing Facility-1 to the VAB is targeted for May 10. Once there it will be mated with the external tank and boosters. Atlantis and its crew of four will deliver the Raffaello multipurpose logistics module packed with supplies and spare parts to the International Space Station. STS-135 is targeted to launch June 28, and will be the last spaceflight for the Space Shuttle Program. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. - In the Vehicle Assembly Building (VAB) at NASA's Kennedy Space Center in Florida, workers monitor the progress of external fuel tank, ET-138, for space shuttle Atlantis' STS-135 mission, as it is positioned between the twin solid rocket boosters on the mobile launcher platform in high bay-1. Shuttle Atlantis' move, or "rollover," from Orbiter Processing Facility-1 to the VAB is targeted for May 10. Once there it will be mated with the external tank and boosters. Atlantis and its crew of four will deliver the Raffaello multipurpose logistics module packed with supplies and spare parts to the International Space Station. STS-135 is targeted to launch June 28, and will be the last spaceflight for the Space Shuttle Program. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. - In the Vehicle Assembly Building (VAB) at NASA's Kennedy Space Center in Florida, external fuel tank, ET-138, for space shuttle Atlantis' STS-135 mission, is lowered into high bay-1 for joining with the twin solid rocket boosters on the mobile launcher platform. Shuttle Atlantis' move, or "rollover," from Orbiter Processing Facility-1 to the VAB is targeted for May 10. Once there it will be mated with the external tank and boosters. Atlantis and its crew of four will deliver the Raffaello multipurpose logistics module packed with supplies and spare parts to the International Space Station. STS-135 is targeted to launch June 28, and will be the last spaceflight for the Space Shuttle Program. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. - In Orbiter Processing Facility-1 at NASA's Kennedy Space Center in Florida, this image shows in detail a view of the hydraulic system connected to the underside of shuttle Atlantis that will lift the vehicle off the floor to enable the orbiter transport system, or OTS, to be rolled underneath for its move, or "rollover," to the Vehicle Assembly Building. Once there Atlantis will be joined with the external fuel tank and solid rocket boosters on the mobile launcher platform. Atlantis is being prepared for the STS-135 mission, which will deliver the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts to the International Space Station. STS-135 is targeted to launch June 28, and will be the last spaceflight for the Space Shuttle Program. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. - In the Vehicle Assembly Building (VAB) at NASA's Kennedy Space Center in Florida, workers monitor the progress of external fuel tank, ET-138, for space shuttle Atlantis' STS-135 mission, as it is lowered into high bay-1 between the twin solid rocket boosters on the mobile launcher platform. Shuttle Atlantis' move, or "rollover," from Orbiter Processing Facility-1 to the VAB is targeted for May 10. Once there it will be mated with the external tank and boosters. Atlantis and its crew of four will deliver the Raffaello multipurpose logistics module packed with supplies and spare parts to the International Space Station. STS-135 is targeted to launch June 28, and will be the last spaceflight for the Space Shuttle Program. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. - In the Vehicle Assembly Building (VAB) at NASA's Kennedy Space Center in Florida, external fuel tank, ET-138, for space shuttle Atlantis' STS-135 mission, is positioned between the twin solid rocket boosters on the mobile launcher platform in high bay-1. Shuttle Atlantis' move, or "rollover," from Orbiter Processing Facility-1 to the VAB is targeted for May 10. Once there it will be mated with the external tank and boosters. Atlantis and its crew of four will deliver the Raffaello multipurpose logistics module packed with supplies and spare parts to the International Space Station. STS-135 is targeted to launch June 28, and will be the last spaceflight for the Space Shuttle Program. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. - In the Vehicle Assembly Building (VAB) at NASA's Kennedy Space Center in Florida, external fuel tank, ET-138, for space shuttle Atlantis' STS-135 mission, is being lowered between the twin solid rocket boosters on the mobile launcher platform in high bay-1. Shuttle Atlantis' move, or "rollover," from Orbiter Processing Facility-1 to the VAB is targeted for May 10. Once there it will be mated with the external tank and boosters. Atlantis and its crew of four will deliver the Raffaello multipurpose logistics module packed with supplies and spare parts to the International Space Station. STS-135 is targeted to launch June 28, and will be the last spaceflight for the Space Shuttle Program. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. - In the Vehicle Assembly Building (VAB) at NASA's Kennedy Space Center in Florida, workers monitor the progress of external fuel tank, ET-138, for space shuttle Atlantis' STS-135 mission, as it is lowered into high bay-1 between the twin solid rocket boosters on the mobile launcher platform. Shuttle Atlantis' move, or "rollover," from Orbiter Processing Facility-1 to the VAB is targeted for May 10. Once there it will be mated with the external tank and boosters. Atlantis and its crew of four will deliver the Raffaello multipurpose logistics module packed with supplies and spare parts to the International Space Station. STS-135 is targeted to launch June 28, and will be the last spaceflight for the Space Shuttle Program. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. - In the Vehicle Assembly Building (VAB) at NASA's Kennedy Space Center in Florida, workers guide external fuel tank, ET-138, for space shuttle Atlantis' STS-135 mission, as it is lowered into high bay-1 between the twin solid rocket boosters on the mobile launcher platform. Shuttle Atlantis' move, or "rollover," from Orbiter Processing Facility-1 to the VAB is targeted for May 10. Once there it will be mated with the external tank and boosters. Atlantis and its crew of four will deliver the Raffaello multipurpose logistics module packed with supplies and spare parts to the International Space Station. STS-135 is targeted to launch June 28, and will be the last spaceflight for the Space Shuttle Program. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. - In the Vehicle Assembly Building (VAB) at NASA's Kennedy Space Center in Florida, external fuel tank, ET-138, for space shuttle Atlantis' STS-135 mission, is lowered into high bay-1 for joining with the twin solid rocket boosters on the mobile launcher platform. Shuttle Atlantis' move, or "rollover," from Orbiter Processing Facility-1 to the VAB is targeted for May 10. Once there it will be mated with the external tank and boosters. Atlantis and its crew of four will deliver the Raffaello multipurpose logistics module packed with supplies and spare parts to the International Space Station. STS-135 is targeted to launch June 28, and will be the last spaceflight for the Space Shuttle Program. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. - In the Vehicle Assembly Building (VAB) at NASA's Kennedy Space Center in Florida, external fuel tank, ET-138, for space shuttle Atlantis' STS-135 mission, is transferred to high bay-1 for joining with the twin solid rocket boosters on the mobile launcher platform. Shuttle Atlantis' move, or "rollover," from Orbiter Processing Facility-1 to the VAB is targeted for May 10. Once there it will be mated with the external tank and boosters. Atlantis and its crew of four will deliver the Raffaello multipurpose logistics module packed with supplies and spare parts to the International Space Station. STS-135 is targeted to launch June 28, and will be the last spaceflight for the Space Shuttle Program. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. - In the Vehicle Assembly Building (VAB) at NASA's Kennedy Space Center in Florida, workers guide external fuel tank, ET-138, for space shuttle Atlantis' STS-135 mission, as it is lowered into high bay-1 between the twin solid rocket boosters on the mobile launcher platform. Shuttle Atlantis' move, or "rollover," from Orbiter Processing Facility-1 to the VAB is targeted for May 10. Once there it will be mated with the external tank and boosters. Atlantis and its crew of four will deliver the Raffaello multipurpose logistics module packed with supplies and spare parts to the International Space Station. STS-135 is targeted to launch June 28, and will be the last spaceflight for the Space Shuttle Program. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. - In the Vehicle Assembly Building (VAB) at NASA's Kennedy Space Center in Florida, external fuel tank for space shuttle Atlantis' STS-135 mission, ET-138, is prepared for transfer from its test cell to high bay-1 for joining with the twin solid rocket boosters on the mobile launcher platform. Shuttle Atlantis' move, or "rollover," from Orbiter Processing Facility-1 to the VAB is targeted for May 10. Once there it will be mated with the external tank and boosters. Atlantis and its crew of four will deliver the Raffaello multipurpose logistics module packed with supplies and spare parts to the International Space Station. STS-135 is targeted to launch June 28, and will be the last spaceflight for the Space Shuttle Program. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. - In the Vehicle Assembly Building (VAB) at NASA's Kennedy Space Center in Florida, external fuel tank for space shuttle Atlantis' STS-135 mission, ET-138, is prepared for transfer from its test cell to high bay-1 for joining with the twin solid rocket boosters on the mobile launcher platform. Shuttle Atlantis' move, or "rollover," from Orbiter Processing Facility-1 to the VAB is targeted for May 10. Once there it will be mated with the external tank and boosters. Atlantis and its crew of four will deliver the Raffaello multipurpose logistics module packed with supplies and spare parts to the International Space Station. STS-135 is targeted to launch June 28, and will be the last spaceflight for the Space Shuttle Program. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. - In the Vehicle Assembly Building (VAB) at NASA's Kennedy Space Center in Florida, workers monitor the progress of external fuel tank, ET-138, for space shuttle Atlantis' STS-135 mission, as it is lowered into high bay-1 between the twin solid rocket boosters on the mobile launcher platform. Shuttle Atlantis' move, or "rollover," from Orbiter Processing Facility-1 to the VAB is targeted for May 10. Once there it will be mated with the external tank and boosters. Atlantis and its crew of four will deliver the Raffaello multipurpose logistics module packed with supplies and spare parts to the International Space Station. STS-135 is targeted to launch June 28, and will be the last spaceflight for the Space Shuttle Program. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. - In the Vehicle Assembly Building (VAB) at NASA's Kennedy Space Center in Florida, external fuel tank, ET-138, for space shuttle Atlantis' STS-135 mission, is lowered into high bay-1 for joining with the twin solid rocket boosters on the mobile launcher platform. Shuttle Atlantis' move, or "rollover," from Orbiter Processing Facility-1 to the VAB is targeted for May 10. Once there it will be mated with the external tank and boosters. Atlantis and its crew of four will deliver the Raffaello multipurpose logistics module packed with supplies and spare parts to the International Space Station. STS-135 is targeted to launch June 28, and will be the last spaceflight for the Space Shuttle Program. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. - In the Vehicle Assembly Building (VAB) at NASA's Kennedy Space Center in Florida, external fuel tank, ET-138, for space shuttle Atlantis' STS-135 mission, is lifted from its test cell for transfer to high bay-1 for joining with the twin solid rocket boosters on the mobile launcher platform. Shuttle Atlantis' move, or "rollover," from Orbiter Processing Facility-1 to the VAB is targeted for May 10. Once there it will be mated with the external tank and boosters. Atlantis and its crew of four will deliver the Raffaello multipurpose logistics module packed with supplies and spare parts to the International Space Station. STS-135 is targeted to launch June 28, and will be the last spaceflight for the Space Shuttle Program. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. - In the Vehicle Assembly Building (VAB) at NASA's Kennedy Space Center in Florida, external fuel tank, ET-138, for space shuttle Atlantis' STS-135 mission, is transferred to high bay-1 for joining with the twin solid rocket boosters on the mobile launcher platform. Shuttle Atlantis' move, or "rollover," from Orbiter Processing Facility-1 to the VAB is targeted for May 10. Once there it will be mated with the external tank and boosters. Atlantis and its crew of four will deliver the Raffaello multipurpose logistics module packed with supplies and spare parts to the International Space Station. STS-135 is targeted to launch June 28, and will be the last spaceflight for the Space Shuttle Program. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. - In the Vehicle Assembly Building (VAB) at NASA's Kennedy Space Center in Florida, external fuel tank, ET-138, for space shuttle Atlantis' STS-135 mission, is positioned between the twin solid rocket boosters on the mobile launcher platform in high bay-1. Shuttle Atlantis' move, or "rollover," from Orbiter Processing Facility-1 to the VAB is targeted for May 10. Once there it will be mated with the external tank and boosters. Atlantis and its crew of four will deliver the Raffaello multipurpose logistics module packed with supplies and spare parts to the International Space Station. STS-135 is targeted to launch June 28, and will be the last spaceflight for the Space Shuttle Program. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. - In the Vehicle Assembly Building (VAB) at NASA's Kennedy Space Center in Florida, external fuel tank, ET-138, for space shuttle Atlantis' STS-135 mission, is lowered into high bay-1 for joining with the twin solid rocket boosters on the mobile launcher platform. Shuttle Atlantis' move, or "rollover," from Orbiter Processing Facility-1 to the VAB is targeted for May 10. Once there it will be mated with the external tank and boosters. Atlantis and its crew of four will deliver the Raffaello multipurpose logistics module packed with supplies and spare parts to the International Space Station. STS-135 is targeted to launch June 28, and will be the last spaceflight for the Space Shuttle Program. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. - In the Vehicle Assembly Building (VAB) at NASA's Kennedy Space Center in Florida, external fuel tank, ET-138, for space shuttle Atlantis' STS-135 mission, is lifted from its test cell for transfer to high bay-1 for joining with the twin solid rocket boosters on the mobile launcher platform. Shuttle Atlantis' move, or "rollover," from Orbiter Processing Facility-1 to the VAB is targeted for May 10. Once there it will be mated with the external tank and boosters. Atlantis and its crew of four will deliver the Raffaello multipurpose logistics module packed with supplies and spare parts to the International Space Station. STS-135 is targeted to launch June 28, and will be the last spaceflight for the Space Shuttle Program. Photo credit: NASA/Jack Pfaller

JSC2011-E-059409 (17 May 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, watches as the space shuttle Atlantis is moved from the Orbiter Processing Facility to the Vehicle Assembly Building at NASA?s Kennedy Space Center on May 17, 2011. The move, known as rollover, is a milestone in the preparation for launch as the orbiter leaves its processing hangar to be prepped for its final flight. Photo credit: NASA Photo/Houston Chronicle, Smiley N. Pool

JSC2011-E-059419 (17 May 2011) --- Photographers take pictures of the STS-135 crew as the space shuttle Atlantis is moved from the Orbiter Processing Facility to the Vehicle Assembly Building at NASA?s Kennedy Space Center on May 17, 2011. The move, known as rollover, is a milestone in the preparation for launch as the orbiter leaves its processing hangar to be prepped for its final flight. Photo credit: NASA Photo/Houston Chronicle, Smiley N. Pool

JSC2011-E-059411 (17 May 2011) --- NASA astronaut Rex Walheim, STS-135 mission specialist, watches as the space shuttle Atlantis is moved May 17, 2011. The move, known as rollover, is a milestone in the preparation for launch as the orbiter leaves its processing hangar to be prepped for its final flight. Photo credit: NASA Photo/Houston Chronicle, Smiley N. Pool

CAPE CANAVERAL, Fla. -- Workers and the crew of STS-135 hold up a "We're Behind You, Atlantis" banner during the final planned move of shuttle Atlantis from Orbiter Processing Facility-1 to the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida. The move called "rollover" is a major milestone in processing for the STS-135 mission to the International Space Station. Inside the VAB, the shuttle will be attached to its external fuel tank and solid rocket boosters. Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim are targeted to launch in early July, taking with them the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing spacecraft and return 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/Jack Pfaller

CAPE CANAVERAL, Fla. -- STS-135 Pilot Doug Hurley talks with workers in Orbiter Processing Facility-1 during shuttle Atlantis' final planned move to the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida. The move called "rollover" is a major milestone in processing for the STS-135 mission to the International Space Station. Inside the VAB, the shuttle will be attached to its external fuel tank and solid rocket boosters. Hurley, along with Commander Chris Ferguson, and Mission Specialists Rex Walheim and Sandra Magnus are targeted to launch in early July, taking with them the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing spacecraft and return 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/Jack Pfaller

CAPE CANAVERAL, Fla. -- Members of the media and NASA Kennedy Space Center workers snap photos of the STS-135 crew members who are at the center to watch shuttle Atlantis make its final planned move from Orbiter Processing Facility-1 to the Vehicle Assembly Building. From left, are Mission Specialist Rex Walheim, Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialist Sandra Magnus. The move called "rollover" is a major milestone in processing for the STS-135 mission, which will deliver the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts to the International Space Station. Targeted to launch in early July, STS-135 also will fly a system to investigate the potential for robotically refueling existing spacecraft and return a failed ammonia pump module to help NASA better understand the failure mechanism and improve pump designs for future systems. Inside the VAB, the shuttle will be attached to its external fuel tank and solid rocket boosters. 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. -- Members of the media and NASA Kennedy Space Center workers snap photos of the STS-135 crew members who are at the center to watch shuttle Atlantis make its final planned move from Orbiter Processing Facility-1 to the Vehicle Assembly Building. From left, are Mission Specialist Rex Walheim, Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialist Sandra Magnus. The move called "rollover" is a major milestone in processing for the STS-135 mission, which will deliver the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts to the International Space Station. Targeted to launch in early July, STS-135 also will fly a system to investigate the potential for robotically refueling existing spacecraft and return a failed ammonia pump module to help NASA better understand the failure mechanism and improve pump designs for future systems. Inside the VAB, the shuttle will be attached to its external fuel tank and solid rocket boosters. 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. -- Outside of Orbiter Processing Facility-1 at NASA's Kennedy Space Center in Florida, STS-135 Mission Specialist Sandra Magnus speaks with Kennedy employees while shuttle Atlantis is being moved to the Vehicle Assembly Building (VAB). The move called "rollover" is a major milestone in processing for the STS-135 mission to the International Space Station. Inside the VAB, the shuttle will be attached to its external fuel tank and solid rocket boosters. Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim are targeted to launch in early July, taking with them the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing spacecraft and return 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/Frankie Martin

CAPE CANAVERAL, Fla. -- STS-135 Mission Specialist Sandra Magnus talks with technicians in Orbiter Processing Facility-1 prior shuttle Atlantis' final planned move to the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida. The move called "rollover" is a major milestone in processing for the STS-135 mission to the International Space Station. Inside the VAB, the shuttle will be attached to its external fuel tank and solid rocket boosters. Magnus, along with Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialist Rex Walheim are targeted to launch in early July, taking with them the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing spacecraft and return 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/Jack Pfaller

CAPE CANAVERAL, Fla. -- STS-135 Assistant Launch Director Pete Nickolenko and Kennedy's Associate Director for Business Operations Kelvin Manning, enjoy a lighthearted moment while watching shuttle Atlantis as it slowly backs out of Orbiter Processing Facility-1 during its final planned move to the Vehicle Assembly Building (VAB) at NASA's Kennedy Space Center in Florida. The move called "rollover" is a major milestone in processing for the STS-135 mission to the International Space Station. Inside the VAB, the shuttle will be attached to its external fuel tank and solid rocket boosters. Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim are expected to launch in mid July, taking with them the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing spacecraft and return 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/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. -- The STS-135 crew members pose for a photo in front of shuttle Atlantis, which is making its final planned trek from Orbiter Processing Facility-1 to the Vehicle Assembly Building. From left, are Mission Specialist Rex Walheim, Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialist Sandra Magnus. The move called "rollover" is a major milestone in processing for the STS-135 mission, which will deliver the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts to the International Space Station. Targeted to launch in early July, STS-135 also will fly a system to investigate the potential for robotically refueling existing spacecraft and return a failed ammonia pump module to help NASA better understand the failure mechanism and improve pump designs for future systems. Inside the VAB, the shuttle will be attached to its external fuel tank and solid rocket boosters. 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 talks with United Space Alliance tile technician Terry White, left, and NASA Kennedy Space Center Director Bob Cabana, right, in Orbiter Processing Facility-1 during shuttle Atlantis' final planned move to the Vehicle Assembly Building. The move called "rollover" is a major milestone in processing for the STS-135 mission to the International Space Station. Inside the VAB, the shuttle will be attached to its external fuel tank and solid rocket boosters. Ferguson, along with Pilot Doug Hurley and Mission Specialists Rex Walheim and Sandra Magnus are targeted to launch in early July, taking with them the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing spacecraft and return 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/Jack Pfaller

CAPE CANAVERAL, Fla. -- Shuttle Atlantis' three main engines take center stage in this image as Atlantis is being moved to the Vehicle Assembly Building (VAB) from Orbiter Processing Faciity-1 at NASA's Kennedy Space Center in Florida. The move called "rollover" is a major milestone in processing for the STS-135 mission to the International Space Station. Inside the VAB, the shuttle will be attached to its external fuel tank and solid rocket boosters. Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim are targeted to launch in early July, taking with them the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing spacecraft and return 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/Frankie Martin

CAPE CANAVERAL, Fla. -- Shuttle Atlantis is parked in the transfer aisle in the Vehicle Assembly Building (VAB) at NASA's Kennedy Space Center in Florida. A large yellow sling device (foreground) will be used to lift Atlantis into a high bay for joining to the solid rocket boosters and external tank already installed on a mobile launcher platform. The move called "rollover" is a major milestone in processing for the STS-135 mission to the International Space Station. Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim are expected to launch mid July, taking with them the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing spacecraft and return 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/Jack Pfaller

CAPE CANAVERAL, Fla. -- Shuttle Atlantis makes its final planned move from Orbiter Processing Facility-1 to the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida. The move called "rollover" is a major milestone in processing for the STS-135 mission to the International Space Station. Inside the VAB, the shuttle will be attached to its external fuel tank and solid rocket boosters. Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim are targeted to launch in early July, taking with them the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing spacecraft and return 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/Jack Pfaller

CAPE CANAVERAL, Fla. -- Shuttle Atlantis is prepared for its final planned move from Orbiter Processing Facility-1 to the Vehicle Assembly Building (VAB) at NASA's Kennedy Space Center in Florida. The move called "rollover" is a major milestone in processing for the STS-135 mission to the International Space Station. Inside the VAB, the shuttle will be attached to its external fuel tank and solid rocket boosters. Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim are targeted to launch in early July, taking with them the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing spacecraft and return 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/Frankie Martin

CAPE CANAVERAL, Fla. -- Workers monitor the progress of shuttle Atlantis as it is backing out of Orbiter Processing Faciity-1 on its final planned move to the Vehicle Assembly Building (VAB) at NASA's Kennedy Space Center in Florida. The move called "rollover" is a major milestone in processing for the STS-135 mission to the International Space Station. Inside the VAB, the shuttle will be attached to its external fuel tank and solid rocket boosters. Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim are expected to launch in mid July, taking with them the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing spacecraft and return 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/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. -- Shuttle Atlantis slowly backs out of Orbiter Processing Facility-1 during its final planned move to the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida. The move called "rollover" is a major milestone in processing for the STS-135 mission to the International Space Station. Inside the VAB, the shuttle will be attached to its external fuel tank and solid rocket boosters. Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim are targeted to launch in early July, taking with them the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing spacecraft and return 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/Jack Pfaller

CAPE CANAVERAL, Fla. -- Center Director Bob Cabana (right) speaks with a worker in Orbiter Processing Facility-1 at NASA's Kennedy Space Center in Florida, as shuttle Atlantis is being prepared for it move to the Vehicle Assembly Building (VAB). The move called "rollover" is a major milestone in processing for the STS-135 mission to the International Space Station. Inside the VAB, the shuttle will be attached to its external fuel tank and solid rocket boosters. Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim are expected to launch in mid July, taking with them the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing spacecraft and return 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/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. -- Technicians prepare shuttle Atlantis for its final planned move from Orbiter Processing Facility-1 to the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida. The move called "rollover" is a major milestone in processing for the STS-135 mission to the International Space Station. Inside the VAB, the shuttle will be attached to its external fuel tank and solid rocket boosters. Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim are targeted to launch in early July, taking with them the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing spacecraft and return 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/Jack Pfaller

CAPE CANAVERAL, Fla. -- Workers watch as shuttle Atlantis slowly backs out of Orbiter Processing Facility-1 during its final planned move to the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida. The move called "rollover" is a major milestone in processing for the STS-135 mission to the International Space Station. Inside the VAB, the shuttle will be attached to its external fuel tank and solid rocket boosters. Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim are targeted to launch in early July, taking with them the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing spacecraft and return 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/Jack Pfaller

CAPE CANAVERAL, Fla. -- Shuttle Atlantis slowly backs out of Orbiter Processing Facility-1 during its final planned move to the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida. The move called "rollover" is a major milestone in processing for the STS-135 mission to the International Space Station. Inside the VAB, the shuttle will be attached to its external fuel tank and solid rocket boosters. Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim are targeted to launch in early July, taking with them the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing spacecraft and return 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/Jack Pfaller

CAPE CANAVERAL, Fla. -- Members of the media and Kennedy workers snap photos of shuttle Atlantis as it makes its final planned move from Orbiter Processing Facility-1 to the Vehicle Assembly Building (VAB) at NASA's Kennedy Space Center in Florida. The move called "rollover" is a major milestone in processing for the STS-135 mission to the International Space Station. Inside the VAB, the shuttle will be attached to its external fuel tank and solid rocket boosters. Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim are targeted to launch in early July, taking with them the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing spacecraft and return 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/Frankie Martin

CAPE CANAVERAL, Fla. -- Shuttle Atlantis slowly backs out of Orbiter Processing Facility-1 during its final planned move to the Vehicle Assembly Building (VAB) at NASA's Kennedy Space Center in Florida. The move called "rollover" is a major milestone in processing for the STS-135 mission to the International Space Station. Inside the VAB, the shuttle will be attached to its external fuel tank and solid rocket boosters. Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim are targeted to launch in early July, taking with them the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing spacecraft and return 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/Frankie Martin

CAPE CANAVERAL, Fla. -- Shuttle Atlantis enters the transfer aisle of the Vehicle Assembly Building (VAB) at NASA's Kennedy Space Center in Florida. The move called "rollover" is a major milestone in processing for the STS-135 mission to the International Space Station. Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim are expected to launch mid July, taking with them the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing spacecraft and return 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/Jack Pfaller

CAPE CANAVERAL, Fla. -- Members of the media and Kennedy workers watch as shuttle Atlantis makes its final planned move into the Vehicle Assembly Building (VAB) from Orbiter Processing Facility-1 at NASA's Kennedy Space Center in Florida. The move called "rollover" is a major milestone in processing for the STS-135 mission to the International Space Station. Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim are targeted to launch in early July, taking with them the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing spacecraft and return a failed ammonia nfor 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/Frankie Martin

CAPE CANAVERAL, Fla. -- Shuttle Atlantis makes its final planned move from Orbiter Processing Facility-1 to the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida. The move called "rollover" is a major milestone in processing for the STS-135 mission to the International Space Station. Inside the VAB, the shuttle will be attached to its external fuel tank and solid rocket boosters. Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim are targeted to launch in early July, taking with them the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing spacecraft and return 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/Jack Pfaller

CAPE CANAVERAL, Fla. -- Outside of Orbiter Processing Facility-1 at NASA's Kennedy Space Center in Florida, Kennedy employees and media gather to view shuttle Atlantis as it is being moved to the Vehicle Assembly Building (VAB). The move called "rollover" is a major milestone in processing for the STS-135 mission to the International Space Station. Inside the VAB, the shuttle will be attached to its external fuel tank and solid rocket boosters. Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim are expected to launch in mid July, taking with them the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing spacecraft and return 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/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. -- Shuttle Atlantis slowly backs out of Orbiter Processing Facility-1 during its final planned move to the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida. The move called "rollover" is a major milestone in processing for the STS-135 mission to the International Space Station. Inside the VAB, the shuttle will be attached to its external fuel tank and solid rocket boosters. Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim are targeted to launch in early July, taking with them the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing spacecraft and return 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/Jack Pfaller

CAPE CANAVERAL, Fla. -- Technicians prepare shuttle Atlantis for its final planned move from Orbiter Processing Facility-1 to the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida. The move called "rollover" is a major milestone in processing for the STS-135 mission to the International Space Station. Inside the VAB, the shuttle will be attached to its external fuel tank and solid rocket boosters. Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim are targeted to launch in early July, taking with them the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing spacecraft and return 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/Jack Pfaller

CAPE CANAVERAL, Fla. -- Members of the media and Kennedy workers snap photos of shuttle Atlantis as it makes its final planned move from Orbiter Processing Facility-1 to the Vehicle Assembly Building (VAB) at NASA's Kennedy Space Center in Florida. The move called "rollover" is a major milestone in processing for the STS-135 mission to the International Space Station. Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim are expected to launch mid July, taking with them the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing spacecraft and return 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/Jack Pfaller

CAPE CANAVERAL, Fla. -- Shuttle Atlantis is parked in front of the Vehicle Assembly Building (VAB) at NASA's Kennedy Space Center in Florida as media and Kennedy employees snap photos before it is moved inside. The move called "rollover" is a major milestone in processing for the STS-135 mission to the International Space Station. Inside the VAB, the shuttle will be attached to its external fuel tank and solid rocket boosters. Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim are targeted to launch in early July, taking with them the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing spacecraft and return 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/Frankie Martin

CAPE CANAVERAL, Fla. -- Shuttle Atlantis makes its final planned move from Orbiter Processing Facility-1 to the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida. The move called "rollover" is a major milestone in processing for the STS-135 mission to the International Space Station. Inside the VAB, the shuttle will be attached to its external fuel tank and solid rocket boosters. Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim are targeted to launch in early July, taking with them the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing spacecraft and return 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/Jack Pfaller

CAPE CANAVERAL, Fla. -- Kennedy workers snap photos of shuttle Atlantis as it makes its final planned move into the Vehicle Assembly Building (VAB) from Orbiter Processing Facility-1 at NASA's Kennedy Space Center in Florida. The move called "rollover" is a major milestone in processing for the STS-135 mission to the International Space Station. Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim are targeted to launch in early July, taking with them the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing spacecraft and return a failed ammonia nfor 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/Frankie Martin

CAPE CANAVERAL, Fla. -- A hazy Florida sun shines down on NASA's Kennedy Space Center as shuttle Atlantis makes its final planned move from Orbiter Processing Facility-1 to the Vehicle Assembly Building (VAB). The move called "rollover" is a major milestone in processing for the STS-135 mission to the International Space Station. Inside the VAB, the shuttle will be attached to its external fuel tank and solid rocket boosters. Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim are targeted to launch in early July, taking with them the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing spacecraft and return 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/Frankie Martin

CAPE CANAVERAL, Fla. -- Technicians prepare shuttle Atlantis for its final planned move from Orbiter Processing Facility-1 to the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida. The move called "rollover" is a major milestone in processing for the STS-135 mission to the International Space Station. Inside the VAB, the shuttle will be attached to its external fuel tank and solid rocket boosters. Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim are targeted to launch in early July, taking with them the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing spacecraft and return 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/Jack Pfaller

CAPE CANAVERAL, Fla. -- Technicians prepare shuttle Atlantis for its final planned move from Orbiter Processing Facility-1 to the Vehicle Assembly Building (VAB) at NASA's Kennedy Space Center in Florida. The move called "rollover" is a major milestone in processing for the STS-135 mission to the International Space Station. Inside the VAB, the shuttle will be attached to its external fuel tank and solid rocket boosters. Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim are targeted to launch in early July, taking with them the Raffaello multipurpose logistics module packed with supplies, logistics and spare parts. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing spacecraft and return 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/Frankie Martin

JSC2011-E-059418 (17 May 2011) --- The crew of STS-135, from right, Sandy Magnus, Doug Hurley, Chris Ferguson and Rex Walheim pose for a group photo as the space shuttle Atlantis (out of frame) is moved from the Orbiter Processing facility to the Vehicle Assembly Building at NASA?s Kennedy Space Center in Florida on May 17, 2011. The move, known as rollover, is a milestone in the preparation for launch as the orbiter leaves its processing hangar to be prepped for its final flight. Photo credit: NASA Photo/Houston Chronicle, Smiley N. Pool