CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, space shuttle Endeavour, the last orbiter to join the shuttle fleet, begins rolling off Launch Pad 39B for the 3.4-mile rollaround to Launch Pad 39A. First motion was at 3:16 a.m. EDT. Endeavour was on standby on Pad 39B to be used in the unlikely event that a rescue mission was necessary during space shuttle Atlantis' STS-125 mission to NASA's Hubble Space Telescope. The payload on the STS-127 mission includes the Japan Aerospace Exploration Agency's Kibo Exposed Facility and the Experiment Logistics Module Exposed Section of the International Space Station. They will be installed on the Kibo laboratory already on the station. Launch of STS-127 is targeted for June 13. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – Sunrise over NASA's Kennedy Space Center in Florida finds space shuttle Endeavour half way on its 3.4-mile rollaround from Launch Pad 39B to Launch Pad 39A. First motion was at 3:16 a.m. EDT. Endeavour was on standby on Pad 39B to be used in the unlikely event that a rescue mission was necessary during space shuttle Atlantis' STS-125 mission to NASA's Hubble Space Telescope. The payload on the STS-127 mission includes the Japan Aerospace Exploration Agency's Kibo Exposed Facility and the Experiment Logistics Module Exposed Section of the International Space Station. They will be installed on the Kibo laboratory already on the station. Launch of STS-127 is targeted for June 13. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, space shuttle Endeavour reaches the fork in the crawlerway between Launch Pad 39B, at left, and Launch Pad 39A. First motion of the 3.4-mile rollaround was at 3:16 a.m. EDT. Endeavour was on standby on Pad 39B to be used in the unlikely event that a rescue mission was necessary during space shuttle Atlantis' STS-125 mission to NASA's Hubble Space Telescope. The payload on the STS-127 mission includes the Japan Aerospace Exploration Agency's Kibo Exposed Facility and the Experiment Logistics Module Exposed Section of the International Space Station. They will be installed on the Kibo laboratory already on the station. Launch of STS-127 is targeted for June 13. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, space shuttle Endeavour is illuminated only by lights on the mobile launcher platform as it rolls from Launch Pad 39B on the 3.4-mile rollaround to Launch Pad 39A. First motion was at 3:16 a.m. EDT. Endeavour was on standby on Pad 39B to be used in the unlikely event that a rescue mission was necessary during space shuttle Atlantis' STS-125 mission to NASA's Hubble Space Telescope. The payload on the STS-127 mission includes the Japan Aerospace Exploration Agency's Kibo Exposed Facility and the Experiment Logistics Module Exposed Section of the International Space Station. They will be installed on the Kibo laboratory already on the station. Launch of STS-127 is targeted for June 13. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, space shuttle Endeavour has arrived at Launch Pad 39A and was secured to the pad at 11:42 a.m. EDT. First motion of the 3.4-mile rollaround from Launch Pad 39B was at 3:16 a.m. EDT. Endeavour was on standby on Pad 39B to be used in the unlikely event that a rescue mission was necessary during space shuttle Atlantis' STS-125 mission to NASA's Hubble Space Telescope. The payload on Endeavour's next mission, STS-127, includes the Japan Aerospace Exploration Agency's Kibo Exposed Facility and the Experiment Logistics Module Exposed Section of the International Space Station. They will be installed on the Kibo laboratory already on the station. Launch of STS-127 is targeted for June 13. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, space shuttle Endeavour rolls off Launch Pad 39B for the 3.4-mile rollaround to Launch Pad 39A. Endeavour's external tank and solid rocket boosters are illuminated by lights on the pad's rotating service structure, at right. First motion was at 3:16 a.m. EDT. Endeavour was on standby on Pad 39B to be used in the unlikely event that a rescue mission was necessary during space shuttle Atlantis' STS-125 mission to NASA's Hubble Space Telescope. The payload on the STS-127 mission includes the Japan Aerospace Exploration Agency's Kibo Exposed Facility and the Experiment Logistics Module Exposed Section of the International Space Station. They will be installed on the Kibo laboratory already on the station. Launch of STS-127 is targeted for June 13. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, space shuttle Endeavour is well on its way from Launch Pad 39B on its 3.4-mile rollaround to Launch Pad 39A, at right. First motion was at 3:16 a.m. EDT. Endeavour was on standby on Pad 39B to be used in the unlikely event that a rescue mission was necessary during space shuttle Atlantis' STS-125 mission to NASA's Hubble Space Telescope. The payload on the STS-127 mission includes the Japan Aerospace Exploration Agency's Kibo Exposed Facility and the Experiment Logistics Module Exposed Section of the International Space Station. They will be installed on the Kibo laboratory already on the station. Launch of STS-127 is targeted for June 13. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, space shuttle Endeavour is reflected in standing water near the crawlerway on its trek to Launch Pad 39A. First motion of the 3.4-mile rollaround from Launch Pad 39B was at 3:16 a.m. EDT. Endeavour was on standby on Pad 39B to be used in the unlikely event that a rescue mission was necessary during space shuttle Atlantis' STS-125 mission to NASA's Hubble Space Telescope. The payload on Endeavour's next mission, STS-127, includes the Japan Aerospace Exploration Agency's Kibo Exposed Facility and the Experiment Logistics Module Exposed Section of the International Space Station. They will be installed on the Kibo laboratory already on the station. Launch of STS-127 is targeted for June 13. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, a banner on the perimeter fence of Launch Pad 39A proclaims "Go Endeavour!" as the space shuttle nears the pad. First motion of the 3.4-mile rollaround from Launch Pad 39B was at 3:16 a.m. EDT. Endeavour was on standby on Pad 39B to be used in the unlikely event that a rescue mission was necessary during space shuttle Atlantis' STS-125 mission to NASA's Hubble Space Telescope. The payload on Endeavour's next mission, STS-127, includes the Japan Aerospace Exploration Agency's Kibo Exposed Facility and the Experiment Logistics Module Exposed Section of the International Space Station. They will be installed on the Kibo laboratory already on the station. Launch of STS-127 is targeted for June 13. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – Early morning at NASA's Kennedy Space Center in Florida finds space shuttle Endeavour well on its way from Launch Pad 39B, at right, on its 3.4-mile rollaround to Launch Pad 39A. First motion was at 3:16 a.m. EDT. Endeavour was on standby on Pad 39B to be used in the unlikely event that a rescue mission was necessary during space shuttle Atlantis' STS-125 mission to NASA's Hubble Space Telescope. The payload on the STS-127 mission includes the Japan Aerospace Exploration Agency's Kibo Exposed Facility and the Experiment Logistics Module Exposed Section of the International Space Station. They will be installed on the Kibo laboratory already on the station. Launch of STS-127 is targeted for June 13. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, flags swing in the breeze as space shuttle Endeavour approaches Launch Pad 39A. First motion of the 3.4-mile rollaround from Launch Pad 39B was at 3:16 a.m. EDT. Endeavour was on standby on Pad 39B to be used in the unlikely event that a rescue mission was necessary during space shuttle Atlantis' STS-125 mission to NASA's Hubble Space Telescope. The payload on Endeavour's next mission, STS-127, includes the Japan Aerospace Exploration Agency's Kibo Exposed Facility and the Experiment Logistics Module Exposed Section of the International Space Station. They will be installed on the Kibo laboratory already on the station. Launch of STS-127 is targeted for June 13. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, space shuttle Endeavour nears the end of its 3.4-mile trek from Launch Pad 39B to Launch Pad 39A. First motion of the rollaround from Launch Pad 39B was at 3:16 a.m. EDT, and the shuttle was secured to Launch Pad 39A at 11:42 a.m. EDT. Endeavour was on standby on Pad 39B to be used in the unlikely event that a rescue mission was necessary during space shuttle Atlantis' STS-125 mission to NASA's Hubble Space Telescope. The payload on Endeavour's next mission, STS-127, includes the Japan Aerospace Exploration Agency's Kibo Exposed Facility and the Experiment Logistics Module Exposed Section of the International Space Station. They will be installed on the Kibo laboratory already on the station. Launch of STS-127 is targeted for June 13. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, space shuttle Endeavour makes its final approach toward the fixed and rotating service structures on Launch Pad 39A, at left. First motion of the 3.4-mile rollaround from Launch Pad 39B was at 3:16 a.m. EDT. Endeavour was on standby on Pad 39B to be used in the unlikely event that a rescue mission was necessary during space shuttle Atlantis' STS-125 mission to NASA's Hubble Space Telescope. The payload on Endeavour's next mission, STS-127, includes the Japan Aerospace Exploration Agency's Kibo Exposed Facility and the Experiment Logistics Module Exposed Section of the International Space Station. They will be installed on the Kibo laboratory already on the station. Launch of STS-127 is targeted for June 13. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, space shuttle Endeavour climbs the five percent grade of the crawlerway to the hardstand on Launch Pad 39A. First motion of the 3.4-mile rollaround from Launch Pad 39B was at 3:16 a.m. EDT. Endeavour was on standby on Pad 39B to be used in the unlikely event that a rescue mission was necessary during space shuttle Atlantis' STS-125 mission to NASA's Hubble Space Telescope. The payload on Endeavour's next mission, STS-127, includes the Japan Aerospace Exploration Agency's Kibo Exposed Facility and the Experiment Logistics Module Exposed Section of the International Space Station. They will be installed on the Kibo laboratory already on the station. Launch of STS-127 is targeted for June 13. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – Early morning at NASA's Kennedy Space Center in Florida finds space shuttle Endeavour departing Launch Pad 39B on its 3.4-mile rollaround to Launch Pad 39A. First motion was at 3:16 a.m. EDT. Three lightning towers have been erected already on Pad 39B, at right, to support the new launch vehicles in NASA's Constellation Program. Endeavour was on standby on Pad 39B to be used in the unlikely event that a rescue mission was necessary during space shuttle Atlantis' STS-125 mission to NASA's Hubble Space Telescope. The payload on the STS-127 mission includes the Japan Aerospace Exploration Agency's Kibo Exposed Facility and the Experiment Logistics Module Exposed Section of the International Space Station. They will be installed on the Kibo laboratory already on the station. Launch of STS-127 is targeted for June 13. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, the rotating service structure on Launch Pad 39B is retracted for space shuttle Endeavour's 3.4-mile rollaround to Launch Pad 39A. First motion was at 3:16 a.m. EDT. Endeavour was on standby on Pad 39B to be used in the unlikely event that a rescue mission was necessary during space shuttle Atlantis' STS-125 mission to NASA's Hubble Space Telescope. The payload on the STS-127 mission includes the Japan Aerospace Exploration Agency's Kibo Exposed Facility and the Experiment Logistics Module Exposed Section of the International Space Station. They will be installed on the Kibo laboratory already on the station. Launch of STS-127 is targeted for June 13. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, space shuttle Endeavour comes to a stop over the flame trench on Launch Pad 39A. First motion of the 3.4-mile rollaround from Launch Pad 39B was at 3:16 a.m. EDT, and the shuttle was secured to Launch Pad 39A at 11:42 a.m. EDT. Endeavour was on standby on Pad 39B to be used in the unlikely event that a rescue mission was necessary during space shuttle Atlantis' STS-125 mission to NASA's Hubble Space Telescope. The payload on Endeavour's next mission, STS-127, includes the Japan Aerospace Exploration Agency's Kibo Exposed Facility and the Experiment Logistics Module Exposed Section of the International Space Station. They will be installed on the Kibo laboratory already on the station. Launch of STS-127 is targeted for June 13. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – As the sun rises over NASA's Kennedy Space Center in Florida, space shuttle Endeavour is half way on its 3.4-mile rollaround from Launch Pad 39B to Launch Pad 39A. First motion was at 3:16 a.m. EDT. Endeavour was on standby on Pad 39B to be used in the unlikely event that a rescue mission was necessary during space shuttle Atlantis' STS-125 mission to NASA's Hubble Space Telescope. The payload on the STS-127 mission includes the Japan Aerospace Exploration Agency's Kibo Exposed Facility and the Experiment Logistics Module Exposed Section of the International Space Station. They will be installed on the Kibo laboratory already on the station. Launch of STS-127 is targeted for June 13. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – A sign announces processing activities in progress at NASA's Kennedy Space Center in Florida. Space shuttle Endeavour is well on its way from Launch Pad 39B to Launch Pad 39A. First motion of the 3.4-mile rollaround was at 3:16 a.m. EDT. Endeavour was on standby on Pad 39B to be used in the unlikely event that a rescue mission was necessary during space shuttle Atlantis' STS-125 mission to NASA's Hubble Space Telescope. The payload on the STS-127 mission includes the Japan Aerospace Exploration Agency's Kibo Exposed Facility and the Experiment Logistics Module Exposed Section of the International Space Station. They will be installed on the Kibo laboratory already on the station. Launch of STS-127 is targeted for June 13. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, the Atlantic Ocean is backdrop for space shuttle Endeavour as it reaches the hardstand on Launch Pad 39A. First motion of the 3.4-mile rollaround from Launch Pad 39B was at 3:16 a.m. EDT, and the shuttle was secured to Launch Pad 39A at 11:42 a.m. EDT. Endeavour was on standby on Pad 39B to be used in the unlikely event that a rescue mission was necessary during space shuttle Atlantis' STS-125 mission to NASA's Hubble Space Telescope. The payload on Endeavour's next mission, STS-127, includes the Japan Aerospace Exploration Agency's Kibo Exposed Facility and the Experiment Logistics Module Exposed Section of the International Space Station. They will be installed on the Kibo laboratory already on the station. Launch of STS-127 is targeted for June 13. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, space shuttle Endeavour approaches Launch Pad 39A, in the background at left. First motion of the 3.4-mile rollaround from Launch Pad 39B was at 3:16 a.m. EDT. Endeavour was on standby on Pad 39B to be used in the unlikely event that a rescue mission was necessary during space shuttle Atlantis' STS-125 mission to NASA's Hubble Space Telescope. The payload on Endeavour's next mission, STS-127, includes the Japan Aerospace Exploration Agency's Kibo Exposed Facility and the Experiment Logistics Module Exposed Section of the International Space Station. They will be installed on the Kibo laboratory already on the station. Launch of STS-127 is targeted for June 13. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, space shuttle Endeavour towers over the mobile launcher platform and crawler transporter beneath it as it rolls from Launch Pad 39B on the 3.4-mile rollaround to Launch Pad 39A. First motion was at 3:16 a.m. EDT. Endeavour was on standby on Pad 39B to be used in the unlikely event that a rescue mission was necessary during space shuttle Atlantis' STS-125 mission to NASA's Hubble Space Telescope. The payload on the STS-127 mission includes the Japan Aerospace Exploration Agency's Kibo Exposed Facility and the Experiment Logistics Module Exposed Section of the International Space Station. They will be installed on the Kibo laboratory already on the station. Launch of STS-127 is targeted for June 13. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, space shuttle Endeavour is well on its way from Launch Pad 39B on its 3.4-mile rollaround to Launch Pad 39A. First motion was at 3:16 a.m. EDT. Endeavour was on standby on Pad 39B to be used in the unlikely event that a rescue mission was necessary during space shuttle Atlantis' STS-125 mission to NASA's Hubble Space Telescope. The payload on the STS-127 mission includes the Japan Aerospace Exploration Agency's Kibo Exposed Facility and the Experiment Logistics Module Exposed Section of the International Space Station. They will be installed on the Kibo laboratory already on the station. Launch of STS-127 is targeted for June 13. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, space shuttle Endeavour begins its slow roll off Launch Pad 39B for the 3.4-mile rollaround to Launch Pad 39A. First motion was at 3:16 a.m. EDT. Endeavour was on standby on Pad 39B to be used in the unlikely event that a rescue mission was necessary during space shuttle Atlantis' STS-125 mission to NASA's Hubble Space Telescope. The payload on the STS-127 mission includes the Japan Aerospace Exploration Agency's Kibo Exposed Facility and the Experiment Logistics Module Exposed Section of the International Space Station. They will be installed on the Kibo laboratory already on the station. Launch of STS-127 is targeted for June 13. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, workers monitor the progress of space shuttle Endeavour as it makes its final approach toward the fixed and rotating service structures on Launch Pad 39A. First motion of the 3.4-mile rollaround from Launch Pad 39B was at 3:16 a.m. EDT. Endeavour was on standby on Pad 39B to be used in the unlikely event that a rescue mission was necessary during space shuttle Atlantis' STS-125 mission to NASA's Hubble Space Telescope. The payload on Endeavour's next mission, STS-127, includes the Japan Aerospace Exploration Agency's Kibo Exposed Facility and the Experiment Logistics Module Exposed Section of the International Space Station. They will be installed on the Kibo laboratory already on the station. Launch of STS-127 is targeted for June 13. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – Early morning at NASA's Kennedy Space Center in Florida finds space shuttle Endeavour well on its way from Launch Pad 39B, at right, on its 3.4-mile rollaround to Launch Pad 39A. First motion was at 3:16 a.m. EDT. Endeavour was on standby on Pad 39B to be used in the unlikely event that a rescue mission was necessary during space shuttle Atlantis' STS-125 mission to NASA's Hubble Space Telescope. The payload on the STS-127 mission includes the Japan Aerospace Exploration Agency's Kibo Exposed Facility and the Experiment Logistics Module Exposed Section of the International Space Station. They will be installed on the Kibo laboratory already on the station. Launch of STS-127 is targeted for June 13. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, space shuttle Endeavour leaves Launch Pad 39B behind on its 3.4-mile rollaround to Launch Pad 39A. Endeavour's external tank and solid rocket boosters are illuminated by lights on the pad's rotating service structure, at right. First motion was at 3:16 a.m. EDT. Endeavour was on standby on Pad 39B to be used in the unlikely event that a rescue mission was necessary during space shuttle Atlantis' STS-125 mission to NASA's Hubble Space Telescope. The payload on the STS-127 mission includes the Japan Aerospace Exploration Agency's Kibo Exposed Facility and the Experiment Logistics Module Exposed Section of the International Space Station. They will be installed on the Kibo laboratory already on the station. Launch of STS-127 is targeted for June 13. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, space shuttle Endeavour passes the fork in the crawlerway between Launch Pad 39B, at right, and Launch Pad 39A. First motion of the 3.4-mile rollaround was at 3:16 a.m. EDT. Endeavour was on standby on Pad 39B to be used in the unlikely event that a rescue mission was necessary during space shuttle Atlantis' STS-125 mission to NASA's Hubble Space Telescope. The payload on the STS-127 mission includes the Japan Aerospace Exploration Agency's Kibo Exposed Facility and the Experiment Logistics Module Exposed Section of the International Space Station. They will be installed on the Kibo laboratory already on the station. Launch of STS-127 is targeted for June 13. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – At NASA's Kennedy Space Center in Florida, lights on the mobile launcher platform reveal space shuttle Endeavour beginning its roll off Launch Pad 39B for the 3.4-mile rollaround to Launch Pad 39A. First motion was at 3:16 a.m. EDT. Endeavour was on standby on Pad 39B to be used in the unlikely event that a rescue mission was necessary during space shuttle Atlantis' STS-125 mission to NASA's Hubble Space Telescope. The payload on the STS-127 mission includes the Japan Aerospace Exploration Agency's Kibo Exposed Facility and the Experiment Logistics Module Exposed Section of the International Space Station. They will be installed on the Kibo laboratory already on the station. Launch of STS-127 is targeted for June 13. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. - At NASA's Kennedy Space Center in Florida, space shuttle Endeavour is rolling off Launch Pad 39B for the 3.4-mile rollaround to Launch Pad 39A. First motion was at 8:28 a.m. EDT. Endeavour is targeted to launch Nov. 14 on the STS-126 mission. On this 27th mission to the International Space Station, Endeavour will carry the Lightweight Multi-Purpose Experiment Support Structure Carrier and the Multi-Purpose Logistics Module Leonardo that will hold supplies and equipment, including additional crew quarters, additional exercise equipment, spare hardware and equipment for the regenerative life support system. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. - At NASA's Kennedy Space Center in Florida, space shuttle Endeavour begins rolling off Launch Pad 39B for the 3.4-mile rollaround to Launch Pad 39A. First motion was at 8:28 a.m. EDT. Endeavour is targeted to launch Nov. 14 on the STS-126 mission. On this 27th mission to the International Space Station, Endeavour will carry the Lightweight Multi-Purpose Experiment Support Structure Carrier and the Multi-Purpose Logistics Module Leonardo that will hold supplies and equipment, including additional crew quarters, additional exercise equipment, spare hardware and equipment for the regenerative life support system. Photo credit: NASA/Troy Cryder

CAPE CANAVERAL, Fla. - At NASA's Kennedy Space Center in Florida, space shuttle Endeavour rolls off Launch Pad 39B for the 3.4-mile rollaround to Launch Pad 39A. First motion was at 8:28 a.m. EDT. Endeavour is targeted to launch Nov. 14 on the STS-126 mission. On this 27th mission to the International Space Station, Endeavour will carry the Lightweight Multi-Purpose Experiment Support Structure Carrier and the Multi-Purpose Logistics Module Leonardo that will hold supplies and equipment, including additional crew quarters, additional exercise equipment, spare hardware and equipment for the regenerative life support system. Photo credit: NASA/Troy Cryder

CAPE CANAVERAL, Fla. - At NASA's Kennedy Space Center in Florida, the driver of the crawler-transporter keeps space shuttle Endeavour atop the mobile launcher platform rolling off Launch Pad 39B for the 3.4-mile rollaround to Launch Pad 39A. First motion was at 8:28 a.m. EDT. Endeavour is targeted to launch Nov. 14 on the STS-126 mission. On this 27th mission to the International Space Station, Endeavour will carry the Lightweight Multi-Purpose Experiment Support Structure Carrier and the Multi-Purpose Logistics Module Leonardo that will hold supplies and equipment, including additional crew quarters, additional exercise equipment, spare hardware and equipment for the regenerative life support system. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. - At NASA's Kennedy Space Center in Florida, space shuttle Endeavour begins rolling off Launch Pad 39B for the 3.4-mile rollaround to Launch Pad 39A. First motion was at 8:28 a.m. EDT. To the left is the open rotating service structure with the Payload Changeout Room and the fixed service structure with the 80-foot-tall lightning mast on top. Endeavour is targeted to launch Nov. 14 on the STS-126 mission. On this 27th mission to the International Space Station, Endeavour will carry the Lightweight Multi-Purpose Experiment Support Structure Carrier and the Multi-Purpose Logistics Module Leonardo that will hold supplies and equipment, including additional crew quarters, additional exercise equipment, spare hardware and equipment for the regenerative life support system. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. - At NASA's Kennedy Space Center in Florida, space shuttle Endeavour is rolling off Launch Pad 39B for the 3.4-mile rollaround to Launch Pad 39A. The waving flag indicates the crawler-transporter is nearing the pad gate. First motion was at 8:28 a.m. EDT. Endeavour is targeted to launch Nov. 14 on the STS-126 mission. On this 27th mission to the International Space Station, Endeavour will carry the Lightweight Multi-Purpose Experiment Support Structure Carrier and the Multi-Purpose Logistics Module Leonardo that will hold supplies and equipment, including additional crew quarters, additional exercise equipment, spare hardware and equipment for the regenerative life support system. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. - At NASA's Kennedy Space Center in Florida, space shuttle Endeavour atop the mobile launcher platform is seen as it begins rolling off Launch Pad 39B for the 3.4-mile rollaround to Launch Pad 39A. First motion was at 8:28 a.m. EDT. The white object at left is the White Room at the end of the orbiter access arm on the fixed service structure. Endeavour is targeted to launch Nov. 14 on the STS-126 mission. On this 27th mission to the International Space Station, Endeavour will carry the Lightweight Multi-Purpose Experiment Support Structure Carrier and the Multi-Purpose Logistics Module Leonardo that will hold supplies and equipment, including additional crew quarters, additional exercise equipment, spare hardware and equipment for the regenerative life support system. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. - At NASA's Kennedy Space Center in Florida, space shuttle Endeavour waits to begin rolling off Launch Pad 39B for the 3.4-mile rollaround to Launch Pad 39A. First motion was at 8:28 a.m. EDT. To the left is the open rotating service structure and the fixed service structure with the 80-foot-tall lightning mast on top. Endeavour is targeted to launch Nov. 14 on the STS-126 mission. On this 27th mission to the International Space Station, Endeavour will carry the Lightweight Multi-Purpose Experiment Support Structure Carrier and the Multi-Purpose Logistics Module Leonardo that will hold supplies and equipment, including additional crew quarters, additional exercise equipment, spare hardware and equipment for the regenerative life support system. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. - At NASA's Kennedy Space Center in Florida, space shuttle Endeavour atop the mobile launcher platform and crawler-transporter span the flame trench as they begin rolling off Launch Pad 39B for the 3.4-mile rollaround to Launch Pad 39A. First motion was at 8:28 a.m. EDT. Endeavour is targeted to launch Nov. 14 on the STS-126 mission. On this 27th mission to the International Space Station, Endeavour will carry the Lightweight Multi-Purpose Experiment Support Structure Carrier and the Multi-Purpose Logistics Module Leonardo that will hold supplies and equipment, including additional crew quarters, additional exercise equipment, spare hardware and equipment for the regenerative life support system. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. - A view of Launch Pad 39B at NASA's Kennedy Space Center in Florida shows space shuttle Endeavour rolling off the pad for the 3.4-mile rollaround to Launch Pad 39A. First motion was at 8:28 a.m. EDT. At right is the open rotating service structure with the Payload Changeout Room and the fixed service structure with the 80-foot-tall lightning mast on top. Endeavour is targeted to launch Nov. 14 on the STS-126 mission. On this 27th mission to the International Space Station, Endeavour will carry the Lightweight Multi-Purpose Experiment Support Structure Carrier and the Multi-Purpose Logistics Module Leonardo that will hold supplies and equipment, including additional crew quarters, additional exercise equipment, spare hardware and equipment for the regenerative life support system. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. - At NASA's Kennedy Space Center in Florida, visitors are able to see the rare event of a rollaround as space shuttle Endeavour moves away from Launch Pad 39B and turns toward Launch Pad 39A. First motion from pad 39B was at 8:28 a.m. EDT. Endeavour is targeted to launch Nov. 14 on the STS-126 mission. On this 27th mission to the International Space Station, Endeavour will carry the Lightweight Multi-Purpose Experiment Support Structure Carrier and the Multi-Purpose Logistics Module Leonardo that will hold supplies and equipment, including additional crew quarters, additional exercise equipment, spare hardware and equipment for the regenerative life support system. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. - At NASA's Kennedy Space Center in Florida, space shuttle Endeavour rolls up the ramp toward Launch Pad 39A. The shuttle moved off Launch Pad 39B starting at 8:28 am. EDT and completed its move to Launch Pad 39A at 4:37 p.m. Endeavour is targeted to launch Nov. 14 on the STS-126 mission. On this 27th mission to the International Space Station, Endeavour will carry the Lightweight Multi-Purpose Experiment Support Structure Carrier and the Multi-Purpose Logistics Module Leonardo that will hold supplies and equipment, including additional crew quarters, additional exercise equipment, spare hardware and equipment for the regenerative life support system. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. - Palmettos appear to frame space shuttle Endeavour as it rolls toward Launch Pad 39A on NASA's Kennedy Space Center in Florida. The shuttle earlier moved off Launch Pad 39B starting at 8:28 am. EDT and headed for pad 39A. Endeavour is targeted to launch Nov. 14 on the STS-126 mission. On this 27th mission to the International Space Station, Endeavour will carry the Lightweight Multi-Purpose Experiment Support Structure Carrier and the Multi-Purpose Logistics Module Leonardo that will hold supplies and equipment, including additional crew quarters, additional exercise equipment, spare hardware and equipment for the regenerative life support system. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. - At NASA's Kennedy Space Center in Florida, space shuttle Endeavour, atop the mobile launcher platform, comes to rest on Launch Pad 39A after rolling around from launch Pad 39B. At left are the open rotating service structure and the fixed service structure with the 80-foot-tall lightning mast on top. The shuttle moved off Launch Pad 39B starting at 8:28 am. EDT and completed its move to Launch Pad 39A at 4:37 p.m. Endeavour is targeted to launch Nov. 14 on the STS-126 mission. On this 27th mission to the International Space Station, Endeavour will carry the Lightweight Multi-Purpose Experiment Support Structure Carrier and the Multi-Purpose Logistics Module Leonardo that will hold supplies and equipment, including additional crew quarters, additional exercise equipment, spare hardware and equipment for the regenerative life support system. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. - On Launch Pad 39B at NASA's Kennedy Space Center in Florida, a worker checks for distance between the bottom of the mobile launcher platform and the top of the mount mechanism as space shuttle Endeavour is prepared to roll off the pad. First motion was at 8:28 a.m. EDT. Endeavour is targeted to launch Nov. 14 on the STS-126 mission. On this 27th mission to the International Space Station, Endeavour will carry the Lightweight Multi-Purpose Experiment Support Structure Carrier and the Multi-Purpose Logistics Module Leonardo that will hold supplies and equipment, including additional crew quarters, additional exercise equipment, spare hardware and equipment for the regenerative life support system. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. - At NASA's Kennedy Space Center in Florida, space shuttle Endeavour comes to rest on Launch Pad 39A after rolling around from launch Pad 39B. The shuttle moved off Launch Pad 39B starting at 8:28 am. EDT and completed its move to Launch Pad 39A at 4:37 p.m. Endeavour is targeted to launch Nov. 14 on the STS-126 mission. On this 27th mission to the International Space Station, Endeavour will carry the Lightweight Multi-Purpose Experiment Support Structure Carrier and the Multi-Purpose Logistics Module Leonardo that will hold supplies and equipment, including additional crew quarters, additional exercise equipment, spare hardware and equipment for the regenerative life support system. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. - At NASA's Kennedy Space Center in Florida, space shuttle Endeavour atop its mobile launcher platform leave Launch Pad 39B behind as it rolls around to Launch Pad 39A. First motion was at 8:28 a.m. EDT. Endeavour is targeted to launch Nov. 14 on the STS-126 mission. On this 27th mission to the International Space Station, Endeavour will carry the Lightweight Multi-Purpose Experiment Support Structure Carrier and the Multi-Purpose Logistics Module Leonardo that will hold supplies and equipment, including additional crew quarters, additional exercise equipment, spare hardware and equipment for the regenerative life support system. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. - At NASA's Kennedy Space Center in Florida, space shuttle Endeavour rolls up the ramp toward Launch Pad 39A. The shuttle moved off Launch Pad 39B starting at 8:28 am. EDT and completed its move to Launch Pad 39A at 4:37 p.m. Endeavour is targeted to launch Nov. 14 on the STS-126 mission. On this 27th mission to the International Space Station, Endeavour will carry the Lightweight Multi-Purpose Experiment Support Structure Carrier and the Multi-Purpose Logistics Module Leonardo that will hold supplies and equipment, including additional crew quarters, additional exercise equipment, spare hardware and equipment for the regenerative life support system. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. - At NASA's Kennedy Space Center in Florida, space shuttle Endeavour rolls toward Launch Pad 39A, at right. The shuttle earlier moved off Launch Pad 39B starting at 8:28 am. EDT to head for pad 39A. Endeavour is targeted to launch Nov. 14 on the STS-126 mission. On this 27th mission to the International Space Station, Endeavour will carry the Lightweight Multi-Purpose Experiment Support Structure Carrier and the Multi-Purpose Logistics Module Leonardo that will hold supplies and equipment, including additional crew quarters, additional exercise equipment, spare hardware and equipment for the regenerative life support system. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. - At NASA's Kennedy Space Center in Florida, space shuttle Endeavour reaches the top of Launch Pad 39A after rolling around from launch Pad 39B. The shuttle moved off Launch Pad 39B starting at 8:28 am. EDT and completed its move to Launch Pad 39A at 4:37 p.m. Endeavour is targeted to launch Nov. 14 on the STS-126 mission. On this 27th mission to the International Space Station, Endeavour will carry the Lightweight Multi-Purpose Experiment Support Structure Carrier and the Multi-Purpose Logistics Module Leonardo that will hold supplies and equipment, including additional crew quarters, additional exercise equipment, spare hardware and equipment for the regenerative life support system. Photo credit: NASA/Troy Cryder

CAPE CANAVERAL, Fla. - At NASA's Kennedy Space Center in Florida, space shuttle Endeavour is hard down on Launch Pad 39A after rolling around from launch Pad 39B. The shuttle moved off Launch Pad 39B starting at 8:28 am. EDT and completed its move to Launch Pad 39A at 4:37 p.m. Endeavour is targeted to launch Nov. 14 on the STS-126 mission. On this 27th mission to the International Space Station, Endeavour will carry the Lightweight Multi-Purpose Experiment Support Structure Carrier and the Multi-Purpose Logistics Module Leonardo that will hold supplies and equipment, including additional crew quarters, additional exercise equipment, spare hardware and equipment for the regenerative life support system. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. - At NASA's Kennedy Space Center in Florida, space shuttle Endeavour rolls onto Launch Pad 39A after rolling around from launch Pad 39B. The shuttle moved off Launch Pad 39B starting at 8:28 am. EDT and completed its move to Launch Pad 39A at 4:37 p.m. Endeavour is targeted to launch Nov. 14 on the STS-126 mission. On this 27th mission to the International Space Station, Endeavour will carry the Lightweight Multi-Purpose Experiment Support Structure Carrier and the Multi-Purpose Logistics Module Leonardo that will hold supplies and equipment, including additional crew quarters, additional exercise equipment, spare hardware and equipment for the regenerative life support system. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. - At NASA's Kennedy Space Center in Florida, space shuttle Endeavour rolls through the gate at Launch Pad 39A. The shuttle earlier moved off Launch Pad 39B starting at 8:28 am. EDT to head for pad 39A. Endeavour completed its move to Launch Pad 39A at 4:37 p.m. Endeavour is targeted to launch Nov. 14 on the STS-126 mission. On this 27th mission to the International Space Station, Endeavour will carry the Lightweight Multi-Purpose Experiment Support Structure Carrier and the Multi-Purpose Logistics Module Leonardo that will hold supplies and equipment, including additional crew quarters, additional exercise equipment, spare hardware and equipment for the regenerative life support system. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. - At NASA's Kennedy Space Center in Florida, space shuttle Endeavour, atop the mobile launcher platform, comes to rest on Launch Pad 39A after rolling around from launch Pad 39B. The shuttle moved off Launch Pad 39B starting at 8:28 am. EDT and completed its move to Launch Pad 39A at 4:37 p.m. Endeavour is targeted to launch Nov. 14 on the STS-126 mission. On this 27th mission to the International Space Station, Endeavour will carry the Lightweight Multi-Purpose Experiment Support Structure Carrier and the Multi-Purpose Logistics Module Leonardo that will hold supplies and equipment, including additional crew quarters, additional exercise equipment, spare hardware and equipment for the regenerative life support system. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. - At NASA's Kennedy Space Center in Florida, space shuttle Endeavour turns toward Launch Pad 39A after rolling off Launch Pad 39B. First motion from pad 39B was at 8:28 a.m. EDT. Endeavour is targeted to launch Nov. 14 on the STS-126 mission. On this 27th mission to the International Space Station, Endeavour will carry the Lightweight Multi-Purpose Experiment Support Structure Carrier and the Multi-Purpose Logistics Module Leonardo that will hold supplies and equipment, including additional crew quarters, additional exercise equipment, spare hardware and equipment for the regenerative life support system. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. - At NASA's Kennedy Space Center in Florida, space shuttle Endeavour turns toward Launch Pad 39A after rolling off Launch Pad 39B. First motion was at 8:28 a.m. EDT. Endeavour is targeted to launch Nov. 14 on the STS-126 mission. On this 27th mission to the International Space Station, Endeavour will carry the Lightweight Multi-Purpose Experiment Support Structure Carrier and the Multi-Purpose Logistics Module Leonardo that will hold supplies and equipment, including additional crew quarters, additional exercise equipment, spare hardware and equipment for the regenerative life support system. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. - At NASA's Kennedy Space Center in Florida, space shuttle Endeavour comes to rest on Launch Pad 39A after rolling around from launch Pad 39B. The shuttle moved off Launch Pad 39B starting at 8:28 am. EDT and completed its move to Launch Pad 39A at 4:37 p.m. Endeavour is targeted to launch Nov. 14 on the STS-126 mission. On this 27th mission to the International Space Station, Endeavour will carry the Lightweight Multi-Purpose Experiment Support Structure Carrier and the Multi-Purpose Logistics Module Leonardo that will hold supplies and equipment, including additional crew quarters, additional exercise equipment, spare hardware and equipment for the regenerative life support system. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. - At NASA's Kennedy Space Center in Florida, space shuttle Endeavour rolls up the ramp toward Launch Pad 39A. At right are the open rotating service structure and the fixed service structure with the 80-foot-tall lightning mast on top. The shuttle moved off Launch Pad 39B starting at 8:28 am. EDT and completed its move to Launch Pad 39A at 4:37 p.m. Endeavour is targeted to launch Nov. 14 on the STS-126 mission. On this 27th mission to the International Space Station, Endeavour will carry the Lightweight Multi-Purpose Experiment Support Structure Carrier and the Multi-Purpose Logistics Module Leonardo that will hold supplies and equipment, including additional crew quarters, additional exercise equipment, spare hardware and equipment for the regenerative life support system. Photo credit: NASA/Troy Cryder

CAPE CANAVERAL, Fla. - At NASA's Kennedy Space Center in Florida, the crawler-transporter beneath space shuttle Endeavour and the mobile launcher platform makes its slow journey from Launch Pad 39B to Launch Pad 39A, a 3.4-mile trip. First motion was at 8:28 a.m. EDT. Endeavour is targeted to launch Nov. 14 on the STS-126 mission. On this 27th mission to the International Space Station, Endeavour will carry the Lightweight Multi-Purpose Experiment Support Structure Carrier and the Multi-Purpose Logistics Module Leonardo that will hold supplies and equipment, including additional crew quarters, additional exercise equipment, spare hardware and equipment for the regenerative life support system. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. - At Launch Pad 39A at NASA's Kennedy Space Center in Florida, the canister containing the payload for space shuttle Endeavour’s STS-127 mission is lifted from its transporter toward the Payload Changeout Room. Endeavour’s rollaround from Pad 39B to Pad 39A is planned for May 30. The STS-127 payload includes the Japan Aerospace Exploration Agency's Kibo Exposed Facility and the Experiment Logistics Module Exposed Section of the International Space Station. They will be installed on the Kibo laboratory already on the station. Launch of the STS-127 mission is targeted for June 13. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. - At Launch Pad 39A at NASA's Kennedy Space Center in Florida, a crane lifts the canister containing the payload for space shuttle Endeavour’s STS-127 mission from its transporter toward the Payload Changeout Room. Endeavour’s rollaround from Pad 39B to Pad 39A is planned for May 30. The STS-127 payload includes the Japan Aerospace Exploration Agency's Kibo Exposed Facility and the Experiment Logistics Module Exposed Section of the International Space Station. They will be installed on the Kibo laboratory already on the station. Launch of the STS-127 mission is targeted for June 13. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – At Launch Pad 39A at NASA's Kennedy Space Center in Florida, the canister containing the payload for space shuttle Endeavour’s STS-127 mission is prepared for its lift into the Payload Changeout Room above. Endeavour’s rollaround from Pad 39B to Pad 39A is planned for May 30. The STS-127 payload includes the Japan Aerospace Exploration Agency's Kibo Exposed Facility and the Experiment Logistics Module Exposed Section of the International Space Station. They will be installed on the Kibo laboratory already on the station. Launch of the STS-127 mission is targeted for June 13. Photo credit: NASA/Tim Jacobs

CAPE CANAVERAL, Fla. – At Launch Pad 39A at NASA's Kennedy Space Center in Florida, the canister containing the payload for space shuttle Endeavour’s STS-127 mission is lifted into the Payload Changeout Room, a fixture of the pad’s Rotating Service Structure. Endeavour’s rollaround from Pad 39B to Pad 39A is planned for May 30. The STS-127 payload includes the Japan Aerospace Exploration Agency's Kibo Exposed Facility and the Experiment Logistics Module Exposed Section of the International Space Station. They will be installed on the Kibo laboratory already on the station. Launch of the STS-127 mission is targeted for June 13. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – At Launch Pad 39A at NASA's Kennedy Space Center in Florida, the canister containing the payload for space shuttle Endeavour’s STS-127 mission is secured in the Payload Changeout Room, a fixture of the pad’s Rotating Service Structure. Endeavour’s rollaround from Pad 39B to Pad 39A is planned for May 30. The STS-127 payload includes the Japan Aerospace Exploration Agency's Kibo Exposed Facility and the Experiment Logistics Module Exposed Section of the International Space Station. They will be installed on the Kibo laboratory already on the station. Launch of the STS-127 mission is targeted for June 13. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – At Launch Pad 39A at NASA's Kennedy Space Center in Florida, a crane lifts the canister containing the payload for space shuttle Endeavour’s STS-127 mission into the Payload Changeout Room. Endeavour’s rollaround from Pad 39B to Pad 39A is planned for May 30. The STS-127 payload includes the Japan Aerospace Exploration Agency's Kibo Exposed Facility and the Experiment Logistics Module Exposed Section of the International Space Station. They will be installed on the Kibo laboratory already on the station. Launch of the STS-127 mission is targeted for June 13. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – At Launch Pad 39A at NASA's Kennedy Space Center in Florida, the canister containing the payload for space shuttle Endeavour’s STS-127 mission is prepared for its lift into the Payload Changeout Room. Endeavour’s rollaround from Pad 39B to Pad 39A is planned for May 30. The STS-127 payload includes the Japan Aerospace Exploration Agency's Kibo Exposed Facility and the Experiment Logistics Module Exposed Section of the International Space Station. They will be installed on the Kibo laboratory already on the station. Launch of the STS-127 mission is targeted for June 13. Photo credit: NASA/Tim Jacobs

CAPE CANAVERAL, Fla. – At Launch Pad 39A at NASA's Kennedy Space Center in Florida, the canister containing the payload for space shuttle Endeavour’s STS-127 mission is positioned into the Payload Changeout Room, a fixture of the pad’s Rotating Service Structure. Endeavour’s rollaround from Pad 39B to Pad 39A is planned for May 30. The STS-127 payload includes the Japan Aerospace Exploration Agency's Kibo Exposed Facility and the Experiment Logistics Module Exposed Section of the International Space Station. They will be installed on the Kibo laboratory already on the station. Launch of the STS-127 mission is targeted for June 13. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. – At Launch Pad 39A at NASA's Kennedy Space Center in Florida, the canister containing the payload for space shuttle Endeavour’s STS-127 mission awaits a lift into the Payload Changeout Room. Endeavour’s rollaround from Pad 39B to Pad 39A is planned for May 30. The STS-127 payload includes the Japan Aerospace Exploration Agency's Kibo Exposed Facility and the Experiment Logistics Module Exposed Section of the International Space Station. They will be installed on the Kibo laboratory already on the station. Launch of the STS-127 mission is targeted for June 13. Photo credit: NASA/Tim Jacobs

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, space shuttle Endeavour, its nose encased in protective plastic where its forward reaction control system (FRCS) once resided, is towed out of Orbiter Processing Facility-1 (OPF-1) for its move to the Vehicle Assembly Building (VAB). Endeavour is switching places with shuttle Discovery which temporarily has been stored in the VAB. Both shuttles will stop briefly outside OPF-3 for a "nose-to-nose" photo opportunity. Discovery then will be rolled into OPF-1 and Endeavour into the VAB. In OPF-1, Discovery will undergo further preparations for public display at the Smithsonian's National Air and Space Museum Steven F. Udvar-Hazy Center in Virginia. Endeavour will be stored in the VAB until October when it will be moved into OPF-2 for further work to get it ready for public display at the California Science Center in Los Angeles. For more information, visit http://www.nasa.gov/shuttle. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, the 5.5-million-pound crawler transporters await the opportunity to support NASA's future spaceflight programs. The crawlers originally were built to support the Saturn rockets in NASA's Apollo lunar landing program. The image was taken from the top of the Vehicle Assembly Building (VAB). For more information, visit http://www.nasa.gov/centers/kennedy/pdf/167402main_crawlertransporters07.pdf. Photo credit: Frankie Martin

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, space shuttle Endeavour, its nose encased in protective plastic where its forward reaction control system (FRCS) once resided, backs out of Orbiter Processing Facility-1 (OPF-1) for its move to the Vehicle Assembly Building (VAB). Endeavour is switching places with shuttle Discovery which temporarily has been stored in the VAB. Both shuttles will stop briefly outside OPF-3 for a "nose-to-nose" photo opportunity. Discovery then will be rolled into OPF-1 and Endeavour into the VAB. In OPF-1, Discovery will undergo further preparations for public display at the Smithsonian's National Air and Space Museum Steven F. Udvar-Hazy Center in Virginia. Endeavour will be stored in the VAB until October when it will be moved into OPF-2 for further work to get it ready for public display at the California Science Center in Los Angeles. For more information, visit http://www.nasa.gov/shuttle. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, space shuttle Discovery continues its trip to Orbiter Processing Facility-1 (OPF-1) after stopping for a unique "nose-to-nose" photo opportunity outside OPF-3 with shuttle Endeavour. Endeavour nears the open bay door of the Vehicle Assembly Building (VAB), at right. Discovery, which temporarily was being stored in the VAB, is switching places with Endeavour, which has been undergoing decommissioning in OPF-1. In OPF-1, Discovery will undergo further preparations for public display at the Smithsonian's National Air and Space Museum Steven F. Udvar-Hazy Center in Virginia. Endeavour will be stored in the VAB until October when it will be moved into OPF-2 for further work to get it ready for public display at the California Science Center in Los Angeles. For more information, visit http://www.nasa.gov/shuttle. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, space shuttle Endeavour nears the Vehicle Assembly Building (VAB), where it temporarily will be stored. Endeavour is swapping places with Discovery, which will resume decommissioning activities in Orbiter Processing Facility-1 (OPF-1). The shuttles stopped briefly outside OPF-3 for a unique "nose-to-nose" photo opportunity. In OPF-1, Discovery will undergo further preparations for public display at the Smithsonian's National Air and Space Museum Steven F. Udvar-Hazy Center in Virginia. Endeavour will be stored in the VAB until October when it will be moved into OPF-2 for further work to get it ready for public display at the California Science Center in Los Angeles. For more information, visit http://www.nasa.gov/shuttle. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, space shuttles Discovery, at right, and Endeavour pause outside Orbiter Processing Facility-3 (OPF-3) for a unique "nose-to-nose" photo opportunity. Discovery, which temporarily was being stored in the Vehicle Assembly Building (VAB), is switching places with Endeavour, which has been undergoing decommissioning in OPF-1. Discovery then will be rolled into OPF-1 and Endeavour into the VAB. In OPF-1, Discovery will undergo further preparations for public display at the Smithsonian's National Air and Space Museum Steven F. Udvar-Hazy Center in Virginia. Endeavour will be stored in the VAB until October when it will be moved into OPF-2 for further work to get it ready for public display at the California Science Center in Los Angeles. For more information, visit http://www.nasa.gov/shuttle. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, space shuttle Endeavour backs out of Orbiter Processing Facility-1 (OPF-1) into public view. Endeavour is switching places with shuttle Discovery which temporarily has been housed in the Vehicle Assembly Building (VAB). Both shuttles will stop briefly outside OPF-3 for a "nose-to-nose" photo opportunity. Discovery then will be rolled into OPF-1 and Endeavour into the VAB. In OPF-1, Discovery will undergo further preparations for public display at the Smithsonian's National Air and Space Museum Steven F. Udvar-Hazy Center in Virginia. Endeavour will be stored in the VAB until October when it will be moved into OPF-2 for further work to get it ready for public display at the California Science Center in Los Angeles. For more information, visit http://www.nasa.gov/shuttle. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, space shuttle Discovery backs through the open door of the Vehicle Assembly Building (VAB) into public view, beginning its move to Orbiter Processing Facility-1 (OPF-1). Discovery is switching places with shuttle Endeavour which has been undergoing decommissioning activities in OPF-1. Both shuttles will stop briefly outside OPF-3 for a "nose-to-nose" photo opportunity. Discovery then will be rolled into OPF-1 and Endeavour into the VAB. In OPF-1, Discovery will undergo further preparations for public display at the Smithsonian's National Air and Space Museum Steven F. Udvar-Hazy Center in Virginia. Endeavour will be stored in the VAB until October when it will be moved into OPF-2 for further work to get it ready for public display at the California Science Center in Los Angeles. For more information, visit http://www.nasa.gov/shuttle. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, space shuttle Endeavour has arrived in the Vehicle Assembly Building (VAB), where it temporarily will be stored. Endeavour is swapping places with Discovery, which will resume decommissioning activities in Orbiter Processing Facility-1 (OPF-1). The shuttles stopped briefly outside OPF-3 for a unique "nose-to-nose" photo opportunity. In OPF-1, Discovery will undergo further preparations for public display at the Smithsonian's National Air and Space Museum Steven F. Udvar-Hazy Center in Virginia. Endeavour will be stored in the VAB until October when it will be moved into OPF-2 for further work to get it ready for public display at the California Science Center in Los Angeles. For more information, visit http://www.nasa.gov/shuttle. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, space shuttles Discovery, at right, and Endeavour are parked "nose-to-nose" outside Orbiter Processing Facility-3 (OPF-3) during a unique photo opportunity. Discovery, which temporarily was being stored in the Vehicle Assembly Building (VAB), is switching places with Endeavour, which has been undergoing decommissioning in OPF-1. Discovery then will be rolled into OPF-1 and Endeavour into the VAB. In OPF-1, Discovery will undergo further preparations for public display at the Smithsonian's National Air and Space Museum Steven F. Udvar-Hazy Center in Virginia. Endeavour will be stored in the VAB until October when it will be moved into OPF-2 for further work to get it ready for public display at the California Science Center in Los Angeles. For more information, visit http://www.nasa.gov/shuttle. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, operators begin to move space shuttle Endeavour, its nose encased in protective plastic where its forward reaction control system (FRCS) once resided, from Orbiter Processing Facility-1 (OPF-1) to the Vehicle Assembly Building (VAB). Endeavour is switching places with shuttle Discovery which temporarily has been stored in the VAB. Both shuttles will stop briefly outside OPF-3 for a "nose-to-nose" photo opportunity. Discovery then will be rolled into OPF-1 and Endeavour into the VAB. In OPF-1, Discovery will undergo further preparations for public display at the Smithsonian's National Air and Space Museum Steven F. Udvar-Hazy Center in Virginia. Endeavour will be stored in the VAB until October when it will be moved into OPF-2 for further work to get it ready for public display at the California Science Center in Los Angeles. For more information, visit http://www.nasa.gov/shuttle. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, space shuttles Discovery, at right, and Endeavour pause outside Orbiter Processing Facility-3 (OPF-3) for a unique "nose-to-nose" photo opportunity. Discovery, which temporarily was being stored in the Vehicle Assembly Building (VAB), is switching places with Endeavour, which has been undergoing decommissioning in OPF-1. Discovery then will be rolled into OPF-1 and Endeavour into the VAB. In OPF-1, Discovery will undergo further preparations for public display at the Smithsonian's National Air and Space Museum Steven F. Udvar-Hazy Center in Virginia. Endeavour will be stored in the VAB until October when it will be moved into OPF-2 for further work to get it ready for public display at the California Science Center in Los Angeles. For more information, visit http://www.nasa.gov/shuttle. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, space shuttle Endeavour backs out of Orbiter Processing Facility-1 (OPF-1). Endeavour is switching places with shuttle Discovery which temporarily has been housed in the Vehicle Assembly Building (VAB). Both shuttles will stop briefly outside OPF-3 for a "nose-to-nose" photo opportunity. Discovery then will be rolled into OPF-1 and Endeavour into the VAB. The image was taken from the top of the VAB. In OPF-1, Discovery will undergo further preparations for public display at the Smithsonian's National Air and Space Museum Steven F. Udvar-Hazy Center in Virginia. Endeavour will be stored in the VAB until October when it will be moved into OPF-2 for further work to get it ready for public display at the California Science Center in Los Angeles. For more information, visit http://www.nasa.gov/shuttle. Photo credit: NASA/Frankie Martin

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, space shuttle Endeavour approaches the open bay of the Vehicle Assembly Building (VAB), where it temporarily will be stored. Endeavour is swapping places with Discovery, which will resume decommissioning activities in Orbiter Processing Facility-1 (OPF-1), in the background. The shuttles stopped briefly outside OPF-3 for a unique "nose-to-nose" photo opportunity. In OPF-1, Discovery will undergo further preparations for public display at the Smithsonian's National Air and Space Museum Steven F. Udvar-Hazy Center in Virginia. Endeavour will be stored in the VAB until October when it will be moved into OPF-2 for further work to get it ready for public display at the California Science Center in Los Angeles. For more information, visit http://www.nasa.gov/shuttle. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, space shuttle Discovery nears Orbiter Processing Facility-1 (OPF-1). Discovery, which temporarily was being stored in the Vehicle Assembly Building (VAB), is swapping places with Endeavour, which has been undergoing decommissioning in OPF-1. The shuttles stopped briefly outside OPF-3 for a unique "nose-to-nose" photo opportunity. The image was taken from the top of the VAB. In OPF-1, Discovery will undergo further preparations for public display at the Smithsonian's National Air and Space Museum Steven F. Udvar-Hazy Center in Virginia. Endeavour will be stored in the VAB until October when it will be moved into OPF-2 for further work to get it ready for public display at the California Science Center in Los Angeles. For more information, visit http://www.nasa.gov/shuttle. Photo credit: NASA/Frankie Martin

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, United Space Alliance employees accompany space shuttle Discovery as it is towed from the Vehicle Assembly Building (VAB), beginning its move to Orbiter Processing Facility-1 (OPF-1). Discovery is switching places with shuttle Endeavour which has been undergoing decommissioning activities in OPF-1. Both shuttles will stop briefly outside OPF-3 for a "nose-to-nose" photo opportunity. Discovery then will be rolled into OPF-1 and Endeavour into the VAB. In OPF-1, Discovery will undergo further preparations for public display at the Smithsonian's National Air and Space Museum Steven F. Udvar-Hazy Center in Virginia. Endeavour will be stored in the VAB until October when it will be moved into OPF-2 for further work to get it ready for public display at the California Science Center in Los Angeles. For more information, visit http://www.nasa.gov/shuttle. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. -- Seen through the open bay door of the Vehicle Assembly Building (VAB) at NASA's Kennedy Space Center in Florida, space shuttle Discovery is being prepared for its move to Orbiter Processing Facility-1 (OPF-1). Discovery is switching places with shuttle Endeavour which has been undergoing decommissioning activities in OPF-1. Both shuttles will stop briefly outside OPF-3 for a "nose-to-nose" photo opportunity. Discovery then will be rolled into OPF-1 and Endeavour into the VAB. In OPF-1, Discovery will undergo further preparations for public display at the Smithsonian's National Air and Space Museum Steven F. Udvar-Hazy Center in Virginia. Endeavour will be stored in the VAB until October when it will be moved into OPF-2 for further work to get it ready for public display at the California Science Center in Los Angeles. For more information, visit http://www.nasa.gov/shuttle. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, space shuttle Discovery, at right, approaches shuttle Endeavour outside Orbiter Processing Facility-3 (OPF-3). Discovery, which temporarily was being stored in the Vehicle Assembly Building (VAB), is switching places with Endeavour, which has been undergoing decommissioning in Orbiter Processing Facility-1 (OPF-1). Both shuttles will stop briefly outside OPF-3 for a "nose-to-nose" photo opportunity. Discovery then will be rolled into OPF-1 and Endeavour into the VAB. The image was taken from the top of the VAB. In OPF-1, Discovery will undergo further preparations for public display at the Smithsonian's National Air and Space Museum Steven F. Udvar-Hazy Center in Virginia. Endeavour will be stored in the VAB until October when it will be moved into OPF-2 for further work to get it ready for public display at the California Science Center in Los Angeles. For more information, visit http://www.nasa.gov/shuttle. Photo credit: NASA/Frankie Martin

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, space shuttle Discovery rolls out of the Vehicle Assembly Building (VAB) where it temporarily has been stored. Discovery is switching places with shuttle Endeavour which has been undergoing decommissioning in Orbiter Processing Facility-1 (OPF-1). Both shuttles will stop briefly outside OPF-3 for a "nose-to-nose" photo opportunity. Discovery then will be rolled into OPF-1 and Endeavour into the VAB. The image was taken from the top of the VAB. In OPF-1, Discovery will undergo further preparations for public display at the Smithsonian's National Air and Space Museum Steven F. Udvar-Hazy Center in Virginia. Endeavour will be stored in the VAB until October when it will be moved into OPF-2 for further work to get it ready for public display at the California Science Center in Los Angeles. For more information, visit http://www.nasa.gov/shuttle. Photo credit: NASA/Frankie Martin

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, work has begun to move space shuttle Discovery from the Vehicle Assembly Building (VAB) to Orbiter Processing Facility-1 (OPF-1), seen in the background. Discovery is switching places with shuttle Endeavour which has been undergoing decommissioning activities in OPF-1. Both shuttles will stop briefly outside OPF-3 for a "nose-to-nose" photo opportunity. Discovery then will be rolled into OPF-1 and Endeavour into the VAB. In OPF-1, Discovery will undergo further preparations for public display at the Smithsonian's National Air and Space Museum Steven F. Udvar-Hazy Center in Virginia. Endeavour will be stored in the VAB until October when it will be moved into OPF-2 for further work to get it ready for public display at the California Science Center in Los Angeles. For more information, visit http://www.nasa.gov/shuttle. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, space shuttle Endeavour backs out of Orbiter Processing Facility-1 (OPF-1). Endeavour is switching places with shuttle Discovery which temporarily has been housed in the Vehicle Assembly Building (VAB). Both shuttles will stop briefly outside OPF-3 for a "nose-to-nose" photo opportunity. Discovery then will be rolled into OPF-1 and Endeavour into the VAB. The image was taken from the top of the VAB. In OPF-1, Discovery will undergo further preparations for public display at the Smithsonian's National Air and Space Museum Steven F. Udvar-Hazy Center in Virginia. Endeavour will be stored in the VAB until October when it will be moved into OPF-2 for further work to get it ready for public display at the California Science Center in Los Angeles. For more information, visit http://www.nasa.gov/shuttle. Photo credit: NASA/Frankie Martin

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, space shuttle Endeavour continues on its way to the Vehicle Assembly Building (VAB), where it temporarily will be stored. Endeavour is swapping places with Discovery, at right, on its way to Orbiter Processing Facility-1 (OPF-1) where its decommissioning activities will resume. The shuttles stopped briefly outside OPF-3 for a unique "nose-to-nose" photo opportunity. In OPF-1, Discovery will undergo further preparations for public display at the Smithsonian's National Air and Space Museum Steven F. Udvar-Hazy Center in Virginia. Endeavour will be stored in the VAB until October when it will be moved into OPF-2 for further work to get it ready for public display at the California Science Center in Los Angeles. For more information, visit http://www.nasa.gov/shuttle. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, space shuttle Discovery arrives inside Orbiter Processing Facility-1 (OPF-1) after participating in a unique "nose-to-nose" photo opportunity outside OPF-3 with shuttle Endeavour. Discovery is switching places with Endeavour which temporarily is being placed in storage in the Vehicle Assembly Building (VAB). In OPF-1, Discovery will undergo further preparations for public display at the Smithsonian's National Air and Space Museum Steven F. Udvar-Hazy Center in Virginia. Endeavour will be stored in the VAB until October when it will be moved into OPF-2 for further work to get it ready for public display at the California Science Center in Los Angeles. For more information, visit http://www.nasa.gov/shuttle. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, a spacecraft technician, standing on a work platform next to space shuttle Endeavour, monitors the shuttle as it rolls toward the open door of Orbiter Processing Facility-1 (OPF-1), beginning its move to the Vehicle Assembly Building (VAB). Endeavour is switching places with shuttle Discovery which temporarily has been stored in the VAB. Both shuttles will stop briefly outside OPF-3 for a "nose-to-nose" photo opportunity. Discovery then will be rolled into OPF-1 and Endeavour into the VAB. In OPF-1, Discovery will undergo further preparations for public display at the Smithsonian's National Air and Space Museum Steven F. Udvar-Hazy Center in Virginia. Endeavour will be stored in the VAB until October when it will be moved into OPF-2 for further work to get it ready for public display at the California Science Center in Los Angeles. For more information, visit http://www.nasa.gov/shuttle. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, space shuttle Endeavour, in the distance, approaches shuttle Discovery during its move to the Vehicle Assembly Building (VAB). Discovery is switching places with Endeavour which has been undergoing decommissioning activities in Orbiter Processing Facility-1 (OPF-1). Both shuttles will stop briefly outside OPF-3 for a "nose-to-nose" photo opportunity. Discovery then will be rolled into OPF-1 and Endeavour into the VAB. In OPF-1, Discovery will undergo further preparations for public display at the Smithsonian's National Air and Space Museum Steven F. Udvar-Hazy Center in Virginia. Endeavour will be stored in the VAB until October when it will be moved into OPF-2 for further work to get it ready for public display at the California Science Center in Los Angeles. For more information, visit http://www.nasa.gov/shuttle. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, a banner in Orbiter Processing Facility-1 (OPF-1) proclaims the pride of the center's employees as preparations are made to move space shuttle Endeavour to the Vehicle Assembly Building (VAB). Endeavour is switching places with shuttle Discovery which temporarily has been stored in the VAB. Both shuttles will stop briefly outside OPF-3 for a "nose-to-nose" photo opportunity. Discovery then will be rolled into OPF-1 and Endeavour into the VAB. In OPF-1, Discovery will undergo further preparations for public display at the Smithsonian's National Air and Space Museum Steven F. Udvar-Hazy Center in Virginia. Endeavour will be stored in the VAB until October when it will be moved into OPF-2 for further work to get it ready for public display at the California Science Center in Los Angeles. For more information, visit http://www.nasa.gov/shuttle. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, the aft end of space shuttle Endeavour appears as it backs out of Orbiter Processing Facility-1 (OPF-1). Endeavour is switching places with shuttle Discovery which temporarily has been housed in the Vehicle Assembly Building (VAB). Both shuttles will stop briefly outside OPF-3 for a "nose-to-nose" photo opportunity. Discovery then will be rolled into OPF-1 and Endeavour into the VAB. The image was taken from the top of the VAB. In OPF-1, Discovery will undergo further preparations for public display at the Smithsonian's National Air and Space Museum Steven F. Udvar-Hazy Center in Virginia. Endeavour will be stored in the VAB until October when it will be moved into OPF-2 for further work to get it ready for public display at the California Science Center in Los Angeles. For more information, visit http://www.nasa.gov/shuttle. Photo credit: NASA/Frankie Martin

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, space shuttle Discovery rolls out of the Vehicle Assembly Building (VAB) past employees and media representatives on its way to rendezvous with shuttle Endeavour. Discovery is switching places with Endeavour which has been undergoing decommissioning in Orbiter Processing Facility-1 (OPF-1). Both shuttles will stop briefly outside OPF-3 for a "nose-to-nose" photo opportunity. Discovery then will be rolled into OPF-1 and Endeavour into the VAB. The image was taken from the top of the VAB. In OPF-1, Discovery will undergo further preparations for public display at the Smithsonian's National Air and Space Museum Steven F. Udvar-Hazy Center in Virginia. Endeavour will be stored in the VAB until October when it will be moved into OPF-2 for further work to get it ready for public display at the California Science Center in Los Angeles. For more information, visit http://www.nasa.gov/shuttle. Photo credit: NASA/Frankie Martin

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, space shuttle Discovery rounds a curve as it is towed from the 525-foot-tall Vehicle Assembly Building (VAB) to Orbiter Processing Facility-1 (OPF-1). Discovery is switching places with shuttle Endeavour which has been undergoing decommissioning activities in OPF-1. Both shuttles will stop briefly outside OPF-3 for a "nose-to-nose" photo opportunity. Discovery then will be rolled into OPF-1 and Endeavour into the VAB. In OPF-1, Discovery will undergo further preparations for public display at the Smithsonian's National Air and Space Museum Steven F. Udvar-Hazy Center in Virginia. Endeavour will be stored in the VAB until October when it will be moved into OPF-2 for further work to get it ready for public display at the California Science Center in Los Angeles. For more information, visit http://www.nasa.gov/shuttle. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. -- At Astrotech Space Operation's payload processing facility in Titusville, Fla., preparations are under way to enclose NASA's twin Gravity Recovery and Interior Laboratory spacecraft, at right, in a protective canister for transport to the launch pad. The lunar probes are attached to a spacecraft adapter ring in their side-by-side launch configuration and wrapped in plastic to prevent contamination outside the clean room. The spacecraft will fly in tandem orbits around the moon for several months to measure its gravity field. GRAIL's primary science objectives are to determine the structure of the lunar interior, from crust to core, and to advance understanding of the thermal evolution of the moon. Launch aboard a United Launch Alliance Delta II rocket from Space Launch Complex 17B on Cape Canaveral Air Force Station is scheduled for Sept. 8. For more information, visit http://www.nasa.gov/grail. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. -- Seen through the open bay door of the Vehicle Assembly Building (VAB) at NASA's Kennedy Space Center in Florida, space shuttle Discovery is being prepared for its move to Orbiter Processing Facility-1 (OPF-1). Discovery is switching places with shuttle Endeavour which has been undergoing decommissioning activities in OPF-1. Both shuttles will stop briefly outside OPF-3 for a "nose-to-nose" photo opportunity. Discovery then will be rolled into OPF-1 and Endeavour into the VAB. In OPF-1, Discovery will undergo further preparations for public display at the Smithsonian's National Air and Space Museum Steven F. Udvar-Hazy Center in Virginia. Endeavour will be stored in the VAB until October when it will be moved into OPF-2 for further work to get it ready for public display at the California Science Center in Los Angeles. For more information, visit http://www.nasa.gov/shuttle. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, a spacecraft technician, standing beneath the thermal protection system tile on the underbelly of space shuttle Endeavour, prepares to support the spacecraft's move from Orbiter Processing Facility-1 (OPF-1) to the Vehicle Assembly Building (VAB). Endeavour is switching places with shuttle Discovery which temporarily has been stored in the VAB. Both shuttles will stop briefly outside OPF-3 for a "nose-to-nose" photo opportunity. Discovery then will be rolled into OPF-1 and Endeavour into the VAB. In OPF-1, Discovery will undergo further preparations for public display at the Smithsonian's National Air and Space Museum Steven F. Udvar-Hazy Center in Virginia. Endeavour will be stored in the VAB until October when it will be moved into OPF-2 for further work to get it ready for public display at the California Science Center in Los Angeles. For more information, visit http://www.nasa.gov/shuttle. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, space shuttle Endeavour, in the distance, approaches shuttle Discovery during its move to the Vehicle Assembly Building (VAB). Discovery is switching places with Endeavour which has been undergoing decommissioning activities in Orbiter Processing Facility-1 (OPF-1). Both shuttles will stop briefly outside OPF-3 for a "nose-to-nose" photo opportunity. Discovery then will be rolled into OPF-1 and Endeavour into the VAB. In OPF-1, Discovery will undergo further preparations for public display at the Smithsonian's National Air and Space Museum Steven F. Udvar-Hazy Center in Virginia. Endeavour will be stored in the VAB until October when it will be moved into OPF-2 for further work to get it ready for public display at the California Science Center in Los Angeles. For more information, visit http://www.nasa.gov/shuttle. Photo credit: NASA/Dimitri Gerondidakis