CAPE CANAVERAL, Fla. -- In the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, technicians select the rubber rings that will cushion and secure the left forward center solid rocket booster segments together. The booster along with its twin will be stacked on the mobile launcher platform along with an external fuel tank awaiting the arrival of space shuttle Endeavour for its flight to the International Space Station. As the final planned mission of the Space Shuttle Program, Endeavour and its crew will deliver the Alpha Magnetic Spectrometer, as well as critical spare components to the station on the STS-134 mission targeted for launch Feb. 26, 2011. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- In the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, technicians check the alignment of the rubber rings after installation to the left forward center solid rocket booster segment. The booster along with its twin will be stacked on the mobile launcher platform along with an external fuel tank awaiting the arrival of space shuttle Endeavour for its flight to the International Space Station. As the final planned mission of the Space Shuttle Program, Endeavour and its crew will deliver the Alpha Magnetic Spectrometer, as well as critical spare components to the station on the STS-134 mission targeted for launch Feb. 26, 2011. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- In the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, technicians install the rubber rings around the circumference of the left forward center solid rocket booster segment before the segments are joined. The booster along with its twin will be stacked on the mobile launcher platform along with an external fuel tank awaiting the arrival of space shuttle Endeavour for its flight to the International Space Station. As the final planned mission of the Space Shuttle Program, Endeavour and its crew will deliver the Alpha Magnetic Spectrometer, as well as critical spare components to the station on the STS-134 mission targeted for launch Feb. 26, 2011. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- In the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, technicians stand around the left forward center solid rocket booster segment to properly position the rubber rings around the circumference. The booster along with its twin will be stacked on the mobile launcher platform along with an external fuel tank awaiting the arrival of space shuttle Endeavour for its flight to the International Space Station. As the final planned mission of the Space Shuttle Program, Endeavour and its crew will deliver the Alpha Magnetic Spectrometer, as well as critical spare components to the station on the STS-134 mission targeted for launch Feb. 26, 2011. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- In the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, a worker thoroughly inspects a rubber ring section with an ultraviolet light before installation on the left forward center solid rocket booster segment. The booster along with its twin will be stacked on the mobile launcher platform along with an external fuel tank awaiting the arrival of space shuttle Endeavour for its flight to the International Space Station. As the final planned mission of the Space Shuttle Program, Endeavour and its crew will deliver the Alpha Magnetic Spectrometer, as well as critical spare components to the station on the STS-134 mission targeted for launch Feb. 26, 2011. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- In the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, a technician is applying HD calcium grease to the field joint along the base of the left forward center solid rocket booster segment to inhibit rust and corrosion from occurring in the area. The booster along with its twin will be stacked on the mobile launcher platform along with an external fuel tank awaiting the arrival of space shuttle Endeavour for its flight to the International Space Station. As the final planned mission of the Space Shuttle Program, Endeavour and its crew will deliver the Alpha Magnetic Spectrometer, as well as critical spare components to the station on the STS-134 mission targeted for launch Feb. 26, 2011. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- In the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, technicians check the channel around the circumference of the left forward center solid rocket booster segment for dirt and debris before processing continues. The booster along with its twin will be stacked on the mobile launcher platform along with an external fuel tank awaiting the arrival of space shuttle Endeavour for its flight to the International Space Station. As the final planned mission of the Space Shuttle Program, Endeavour and its crew will deliver the Alpha Magnetic Spectrometer, as well as critical spare components to the station on the STS-134 mission targeted for launch Feb. 26, 2011. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- In the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, a technician double-checks the channel around the circumference of the left forward center solid rocket booster segment for dirt and debris before processing continues. The booster along with its twin will be stacked on the mobile launcher platform along with an external fuel tank awaiting the arrival of space shuttle Endeavour for its flight to the International Space Station. As the final planned mission of the Space Shuttle Program, Endeavour and its crew will deliver the Alpha Magnetic Spectrometer, as well as critical spare components to the station on the STS-134 mission targeted for launch Feb. 26, 2011. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- In the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, workers apply a special solution to the connecting sections of the left forward center solid rocket booster segment before the upper segment is joined to it. The booster along with its twin will be stacked on the mobile launcher platform along with an external fuel tank awaiting the arrival of space shuttle Endeavour for its flight to the International Space Station. As the final planned mission of the Space Shuttle Program, Endeavour and its crew will deliver the Alpha Magnetic Spectrometer, as well as critical spare components to the station on the STS-134 mission targeted for launch Feb. 26, 2011. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- In the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, workers hold up the rubber rings while another thoroughly inspects each section with an ultraviolet light before the rings are installed on the left forward center solid rocket booster segment. The booster along with its twin will be stacked on the mobile launcher platform along with an external fuel tank awaiting the arrival of space shuttle Endeavour for its flight to the International Space Station. As the final planned mission of the Space Shuttle Program, Endeavour and its crew will deliver the Alpha Magnetic Spectrometer, as well as critical spare components to the station on the STS-134 mission targeted for launch Feb. 26, 2011. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- In the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, an inspection is being performed on the bare metal parts of the "tang" end of the segment. The tang mates with the "clevis" and creates a field joint where each segment is put together. Grease has been coated on the bare steel to inhibit rust and corrosion. The booster along with its twin will be stacked on the mobile launcher platform along with an external fuel tank awaiting the arrival of space shuttle Endeavour for its flight to the International Space Station. As the final planned mission of the Space Shuttle Program, Endeavour and its crew will deliver the Alpha Magnetic Spectrometer, as well as critical spare components to the station on the STS-134 mission targeted for launch Feb. 26, 2011. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- In the Rotation, Processing and Surge Facility, or RSPF, at NASA's Kennedy Space Center in Florida, a worker performs the propellant grain inspection of the final solid rocket booster segments, which is a required safety analysis. The booster segments were manufactured at the ATK solid rocket booster plant in Promontory, Utah, and traveled to Kennedy along the Florida East Coast Railway. The booster segments will be stacked and then mated to space shuttle Atlantis and its external fuel tank in the Vehicle Assembly Building. The segments will be used for what currently is planned as the 'launch on need,' or potential rescue mission for the final shuttle flight, Endeavour's STS-134 mission. For information, visit www.nasa.gov_shuttle. Photo credit: NASA_Cory Huston

CAPE CANAVERAL, Fla. -- In the Rotation, Processing and Surge Facility, or RSPF, at NASA's Kennedy Space Center in Florida, workers perform the propellant grain inspection of the final solid rocket booster segments, which is a required safety analysis. The booster segments were manufactured at the ATK solid rocket booster plant in Promontory, Utah, and traveled to Kennedy along the Florida East Coast Railway. The booster segments will be stacked and then mated to space shuttle Atlantis and its external fuel tank in the Vehicle Assembly Building. The segments will be used for what currently is planned as the 'launch on need,' or potential rescue mission for the final shuttle flight, Endeavour's STS-134 mission. For information, visit www.nasa.gov_shuttle. Photo credit: NASA_Cory Huston

CAPE CANAVERAL, Fla. -- In the Rotation, Processing and Surge Facility, or RSPF, at NASA's Kennedy Space Center in Florida, workers perform the propellant grain inspection of the final solid rocket booster segments, which is a required safety analysis. The booster segments were manufactured at the ATK solid rocket booster plant in Promontory, Utah, and traveled to Kennedy along the Florida East Coast Railway. The booster segments will be stacked and then mated to space shuttle Atlantis and its external fuel tank in the Vehicle Assembly Building. The segments will be used for what currently is planned as the 'launch on need,' or potential rescue mission for the final shuttle flight, Endeavour's STS-134 mission. For information, visit www.nasa.gov_shuttle. Photo credit: NASA_Cory Huston

CAPE CANAVERAL, Fla. -- In the Rotation, Processing and Surge Facility, or RSPF, at NASA's Kennedy Space Center in Florida, workers prepare for the propellant grain inspection of the final solid rocket booster segments, which is a required safety analysis. The booster segments were manufactured at the ATK solid rocket booster plant in Promontory, Utah, and traveled to Kennedy along the Florida East Coast Railway. The booster segments will be stacked and then mated to space shuttle Atlantis and its external fuel tank in the Vehicle Assembly Building. The segments will be used for what currently is planned as the 'launch on need,' or potential rescue mission for the final shuttle flight, Endeavour's STS-134 mission. For information, visit www.nasa.gov_shuttle. Photo credit: NASA_Cory Huston

CAPE CANAVERAL, Fla. -- In the Rotation, Processing and Surge Facility, or RSPF, at NASA's Kennedy Space Center in Florida, workers perform the propellant grain inspection of the final solid rocket booster segments, which is a required safety analysis. The booster segments were manufactured at the ATK solid rocket booster plant in Promontory, Utah, and traveled to Kennedy along the Florida East Coast Railway. The booster segments will be stacked and then mated to space shuttle Atlantis and its external fuel tank in the Vehicle Assembly Building. The segments will be used for what currently is planned as the 'launch on need,' or potential rescue mission for the final shuttle flight, Endeavour's STS-134 mission. For information, visit www.nasa.gov_shuttle. Photo credit: NASA_Cory Huston

CAPE CANAVERAL, Fla. -- In the Rotation, Processing and Surge Facility, or RSPF, at NASA's Kennedy Space Center in Florida, workers prepare for the propellant grain inspection of the final solid rocket booster segments, which is a required safety analysis. The booster segments were manufactured at the ATK solid rocket booster plant in Promontory, Utah, and traveled to Kennedy along the Florida East Coast Railway. The booster segments will be stacked and then mated to space shuttle Atlantis and its external fuel tank in the Vehicle Assembly Building. The segments will be used for what currently is planned as the 'launch on need,' or potential rescue mission for the final shuttle flight, Endeavour's STS-134 mission. For information, visit www.nasa.gov_shuttle. Photo credit: NASA_Cory Huston

CAPE CANAVERAL, Fla. -- In the Rotation, Processing and Surge Facility, or RSPF, at NASA's Kennedy Space Center in Florida, a worker performs the propellant grain inspection of the final solid rocket booster segments, which is a required safety analysis. The booster segments were manufactured at the ATK solid rocket booster plant in Promontory, Utah, and traveled to Kennedy along the Florida East Coast Railway. The booster segments will be stacked and then mated to space shuttle Atlantis and its external fuel tank in the Vehicle Assembly Building. The segments will be used for what currently is planned as the 'launch on need,' or potential rescue mission for the final shuttle flight, Endeavour's STS-134 mission. For information, visit www.nasa.gov_shuttle. Photo credit: NASA_Cory Huston

CAPE CANAVERAL, Fla. -- Liberty Star, one of NASA's solid rocket booster retrieval ships, is pictured in the Turn Basin at NASA's Kennedy Space Center in Florida. In the background is the Vehicle Assembly Building where External Tank ET-122 was just delivered from NASA's Michoud Assembly Facility in New Orleans for Endeavour's STS-134 mission to the International Space Station. STS-134, targeted to launch in Feb. 2011, currently is scheduled to be the last mission in the Space Shuttle Program. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. - The NASA Railroad train transports the last space shuttle solid rocket booster segments over the Indian River on the 13-mile trip from the Jay Jay Rail Yard in Titusville, Fla., to NASA's Kennedy Space Center. Six cars transported the segments along the Florida East Coast Railway, which began at the ATK solid rocket booster plant in Promontory, Utah. The booster segments will be used for shuttle Atlantis on what currently is planned as the 'launch on need,' or potential rescue mission for the final shuttle flight, Endeavour's STS-134 mission. For information, visit www.nasa.gov_shuttle. Photo credit: NASA_Jim Grossmann

CAPE CANAVERAL, Fla. - The NASA Railroad draw bridge over the Indian River begins to close for the train carrying the last space shuttle solid rocket booster segments to NASA's Kennedy Space Center. Six cars transported the segments along the Florida East Coast Railway, which began at the ATK solid rocket booster plant in Promontory, Utah. The booster segments will be used for shuttle Atlantis on what currently is planned as the 'launch on need,' or potential rescue mission for the final shuttle flight, Endeavour's STS-134 mission. For information, visit www.nasa.gov_shuttle. Photo credit: NASA_Jim Grossmann

CAPE CANAVERAL, Fla. - At the Jay Jay Rail Yard in Titusville, Fla., the NASA Railroad train is ready to carry the last space shuttle solid rocket booster segments into NASA's Kennedy Space Center. The white railings on the orange spacer cars ensure clearance on their journey. Six cars transported the segments along the Florida East Coast Railway, which began at the ATK solid rocket booster plant in Promontory, Utah. The booster segments will be used for shuttle Atlantis on what currently is planned as the 'launch on need,' or potential rescue mission for the final shuttle flight, Endeavour's STS-134 mission. For information, visit www.nasa.gov_shuttle. Photo credit: NASA_Jim Grossmann

CAPE CANAVERAL, Fla. - The NASA Railroad draw bridge over the Indian River begins to close for the train carrying the last space shuttle solid rocket booster segments to NASA's Kennedy Space Center. Six cars transported the segments along the Florida East Coast Railway, which began at the ATK solid rocket booster plant in Promontory, Utah. The booster segments will be used for shuttle Atlantis on what currently is planned as the 'launch on need,' or potential rescue mission for the final shuttle flight, Endeavour's STS-134 mission. For information, visit www.nasa.gov_shuttle. Photo credit: NASA_Jim Grossmann

CAPE CANAVERAL, Fla. - Gears close the NASA Railroad draw bridge over the Indian River for the train carrying the last space shuttle solid rocket booster segments to NASA's Kennedy Space Center. Six cars transported the segments along the Florida East Coast Railway, which began at the ATK solid rocket booster plant in Promontory, Utah. The booster segments will be used for shuttle Atlantis on what currently is planned as the 'launch on need,' or potential rescue mission for the final shuttle flight, Endeavour's STS-134 mission. For information, visit www.nasa.gov_shuttle. Photo credit: NASA_Jim Grossmann

CAPE CANAVERAL, Fla. - The NASA Railroad train transports the last space shuttle solid rocket booster segments over the Indian River on the 13-mile trip from the Jay Jay Rail Yard in Titusville, Fla., to NASA's Kennedy Space Center. Six cars transported the segments along the Florida East Coast Railway, which began at the ATK solid rocket booster plant in Promontory, Utah. The booster segments will be used for shuttle Atlantis on what currently is planned as the 'launch on need,' or potential rescue mission for the final shuttle flight, Endeavour's STS-134 mission. For information, visit www.nasa.gov_shuttle. Photo credit: NASA_Jim Grossmann

CAPE CANAVERAL, Fla. - The NASA Railroad draw bridge over the Indian River begins to close for the train carrying the last space shuttle solid rocket booster segments to NASA's Kennedy Space Center. Six cars transported the segments along the Florida East Coast Railway, which began at the ATK solid rocket booster plant in Promontory, Utah. The booster segments will be used for shuttle Atlantis on what currently is planned as the 'launch on need,' or potential rescue mission for the final shuttle flight, Endeavour's STS-134 mission. For information, visit www.nasa.gov_shuttle. Photo credit: NASA_Jim Grossmann

CAPE CANAVERAL, Fla. - The NASA Railroad draw bridge over the Indian River begins to close for the train carrying the last space shuttle solid rocket booster segments to NASA's Kennedy Space Center. Six cars transported the segments along the Florida East Coast Railway, which began at the ATK solid rocket booster plant in Promontory, Utah. The booster segments will be used for shuttle Atlantis on what currently is planned as the 'launch on need,' or potential rescue mission for the final shuttle flight, Endeavour's STS-134 mission. For information, visit www.nasa.gov_shuttle. Photo credit: NASA_Jim Grossmann

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, STS-134 Pilot Gregory H. Johnson and Mission Specialist Roberto Vittori with the European Space Agency accompany space shuttle Endeavour's move, or "rollover," to the Vehicle Assembly Building (VAB). In the VAB, Endeavour will be lifted into a high bay where it will be attached to its external fuel tank and solid rocket boosters for its final and upcoming STS-134 mission. Endeavour and its STS-134 crew will deliver the Express Logistics Carrier-3, Alpha Magnetic Spectrometer, spare parts, a high-pressure gas tank, additional spare parts for Dextre and micrometeoroid debris shields to the International Space Station. Launch is targeted for April 19 at 7:48 p.m. EDT. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA

CAPE CANAVERAL, Fla. -- In the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, the external fuel tank, ET-122, for space shuttle Endeavour's final mission soon will be joined to twin solid rocket boosters on a mobile launcher platform. Endeavour will then be stacked with the tank and boosters for its upcoming STS-134 mission to the International Space Station. Endeavour and its crew will deliver the Express Logistics Carrier-3 and the Alpha Magnetic Spectrometer-2 (AMS) to the orbiting laboratory. Launch is targeted for April 19. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Frank Michaux

CAPE CANAVERAL, Fla. -- In the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, technicians watch external fuel tank, ET-122, for space shuttle Endeavour's STS-134 mission as it is being lowered toward the twin solid rocket boosters. When in place the tank will be attached to the boosters on the mobile launcher platform. Endeavour and its crew will deliver the Express Logistics Carrier-3 and the Alpha Magnetic Spectrometer to the International Space Station. Launch is targeted for April 19. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. -- In the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, workers closely monitor the progress of external fuel tank, ET-122, for space shuttle Endeavour's STS-134 mission as it is being lowered toward the twin solid rocket boosters. When in place the tank will be attached to the boosters on the mobile launcher platform. Endeavour and its crew will deliver the Express Logistics Carrier-3 and the Alpha Magnetic Spectrometer to the International Space Station. Launch is targeted for April 19. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. -- In the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, external fuel tank, ET-122, for space shuttle Endeavour's STS-134 mission is being lowered toward the twin solid rocket boosters. When lowered in place, the tank will be attached to the boosters on the mobile launcher platform. Endeavour and its crew will deliver the Express Logistics Carrier-3 and the Alpha Magnetic Spectrometer to the International Space Station. Launch is targeted for April 19. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. -- In the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, technicians watch external fuel tank, ET-122, for space shuttle Endeavour's STS-134 mission as it is being lowered toward the twin solid rocket boosters. When in place the tank will be attached to the boosters on the mobile launcher platform. Endeavour and its crew will deliver the Express Logistics Carrier-3 and the Alpha Magnetic Spectrometer to the International Space Station. Launch is targeted for April 19. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. -- In the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, technicians watch external fuel tank, ET-122, for space shuttle Endeavour's STS-134 mission as it is being lowered toward the twin solid rocket boosters. When in place the tank will be attached to the boosters on the mobile launcher platform. Endeavour and its crew will deliver the Express Logistics Carrier-3 and the Alpha Magnetic Spectrometer to the International Space Station. Launch is targeted for April 19. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. -- In the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, workers observe external fuel tank, ET-122, for space shuttle Endeavour's STS-134 mission as it is being lowered between the twin solid rocket boosters. When in place the tank will be attached to the boosters on the mobile launcher platform. Endeavour and its crew will deliver the Express Logistics Carrier-3 and the Alpha Magnetic Spectrometer to the International Space Station. Launch is targeted for April 19. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. – External tank 134 is towed toward the Vehicle Assembly Building, or VAB, at NASA's Kennedy Space Center in Florida. The Pegasus barge, carrying the fuel tank, arrived in Florida after an ocean voyage towed by a solid rocket booster retrieval ship from NASA's Michoud Assembly Facility near New Orleans. Next, the tank will be transported into the VAB where it will be stored until needed. ET-134 will be used to launch space shuttle Endeavour on the STS-130 mission to the International Space Station. Launch is targeted for Feb. 4, 2010. For information on the components of the space shuttle and the STS-130 mission, visit http://www.nasa.gov/shuttle. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. – External tank 134 has arrived in the transfer aisle of the Vehicle Assembly Building, or VAB, at NASA's Kennedy Space Center in Florida. The Pegasus barge, carrying the fuel tank, arrived in Florida after an ocean voyage towed by a solid rocket booster retrieval ship from NASA's Michoud Assembly Facility near New Orleans. ET-134 will be used to launch space shuttle Endeavour on the STS-130 mission to the International Space Station. Launch is targeted for Feb. 4, 2010. For information on the components of the space shuttle and the STS-130 mission, visit http://www.nasa.gov/shuttle. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. -- Space shuttle Endeavour glistens in the sun on Launch Pad 39A at NASA's Kennedy Space Center in Florida. The massive crawler-transporter that hauled the shuttle, attached to its external fuel tank and solid rocket boosters, to the pad March 10 remains on the crushed crawlerway rocks. The rotating service structure (RSS) that protects the shuttle from the elements and provides access to its components is open to allow crews to move the primary payload for Endeavour's STS-134 mission into the pad's structure before installing it into the spacecraft's cargo bay. Endeavour and its six-member STS-134 crew are targeted to lift off April 19 at 7:48 p.m. EDT to deliver the Alpha Magnetic Spectrometer-2 (AMS) and Express Logistics Carrier-3 to the International Space Station. This is Endeavour's final scheduled mission. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Frank Michaux

CAPE CANAVERAL, Fla. -- In the Rotation, Processing and Surge Facility, or RSPF, at NASA's Kennedy Space Center in Florida, workers prepare for the propellant grain inspection and truing of the final solid rocket booster segments, which is a required safety analysis. The booster segments were manufactured at the ATK solid rocket booster plant in Promontory, Utah, and traveled to Kennedy along the Florida East Coast Railway. The booster segments will be stacked and then mated to space shuttle Atlantis and its external fuel tank in the Vehicle Assembly Building. The segments will be used for what currently is planned as the 'launch on need,' or potential rescue mission for the final shuttle flight, Endeavour's STS-134 mission. For information, visit www.nasa.gov_shuttle. Photo credit: NASA_Cory Huston

CAPE CANAVERAL, Fla. -- In the Rotation, Processing and Surge Facility, or RSPF, at NASA's Kennedy Space Center in Florida, a worker makes sure the final solid rocket booster segments are level, balanced and concentric, which is a required safety analysis. Workers also will perform a propellant grain inspection. The booster segments were manufactured at the ATK solid rocket booster plant in Promontory, Utah, and traveled to Kennedy along the Florida East Coast Railway. The booster segments will be stacked and then mated to space shuttle Atlantis and its external fuel tank in the Vehicle Assembly Building. The segments will be used for what currently is planned as the 'launch on need,' or potential rescue mission for the final shuttle flight, Endeavour's STS-134 mission. For information, visit www.nasa.gov_shuttle. Photo credit: NASA_Cory Huston

CAPE CANAVERAL, Fla. -- In the Rotation, Processing and Surge Facility, or RSPF, at NASA's Kennedy Space Center in Florida, workers prepare for the propellant grain inspection and truing of the final solid rocket booster segments, which is a required safety analysis. The booster segments were manufactured at the ATK solid rocket booster plant in Promontory, Utah, and traveled to Kennedy along the Florida East Coast Railway. The booster segments will be stacked and then mated to space shuttle Atlantis and its external fuel tank in the Vehicle Assembly Building. The segments will be used for what currently is planned as the 'launch on need,' or potential rescue mission for the final shuttle flight, Endeavour's STS-134 mission. For information, visit www.nasa.gov_shuttle. Photo credit: NASA_Cory Huston

CAPE CANAVERAL, Fla. -- In the Rotation, Processing and Surge Facility, or RSPF, at NASA's Kennedy Space Center in Florida, workers prepare for the propellant grain inspection and truing of the final solid rocket booster segments, which is a required safety analysis. The booster segments were manufactured at the ATK solid rocket booster plant in Promontory, Utah, and traveled to Kennedy along the Florida East Coast Railway. The booster segments will be stacked and then mated to space shuttle Atlantis and its external fuel tank in the Vehicle Assembly Building. The segments will be used for what currently is planned as the 'launch on need,' or potential rescue mission for the final shuttle flight, Endeavour's STS-134 mission. For information, visit www.nasa.gov_shuttle. Photo credit: NASA_Cory Huston

CAPE CANAVERAL, Fla. -- In the Rotation, Processing and Surge Facility, or RSPF, at NASA's Kennedy Space Center in Florida, workers prepare for the propellant grain inspection and truing of the final solid rocket booster segments, which is a required safety analysis. The booster segments were manufactured at the ATK solid rocket booster plant in Promontory, Utah, and traveled to Kennedy along the Florida East Coast Railway. The booster segments will be stacked and then mated to space shuttle Atlantis and its external fuel tank in the Vehicle Assembly Building. The segments will be used for what currently is planned as the 'launch on need,' or potential rescue mission for the final shuttle flight, Endeavour's STS-134 mission. For information, visit www.nasa.gov_shuttle. Photo credit: NASA_Cory Huston

CAPE CANAVERAL, Fla. -- In the Rotation, Processing and Surge Facility, or RSPF, at NASA's Kennedy Space Center in Florida, workers make sure the final solid rocket booster segments are level, balanced and concentric, which is a required safety analysis. Workers also will perform a propellant grain inspection. The booster segments were manufactured at the ATK solid rocket booster plant in Promontory, Utah, and traveled to Kennedy along the Florida East Coast Railway. The booster segments will be stacked and then mated to space shuttle Atlantis and its external fuel tank in the Vehicle Assembly Building. The segments will be used for what currently is planned as the 'launch on need,' or potential rescue mission for the final shuttle flight, Endeavour's STS-134 mission. For information, visit www.nasa.gov_shuttle. Photo credit: NASA_Cory Huston

CAPE CANAVERAL, Fla. -- In the Rotation, Processing and Surge Facility, or RSPF, at NASA's Kennedy Space Center in Florida, workers prepare for the propellant grain inspection and truing of the final solid rocket booster segments, which is a required safety analysis. The booster segments were manufactured at the ATK solid rocket booster plant in Promontory, Utah, and traveled to Kennedy along the Florida East Coast Railway. The booster segments will be stacked and then mated to space shuttle Atlantis and its external fuel tank in the Vehicle Assembly Building. The segments will be used for what currently is planned as the 'launch on need,' or potential rescue mission for the final shuttle flight, Endeavour's STS-134 mission. For information, visit www.nasa.gov_shuttle. Photo credit: NASA_Cory Huston

CAPE CANAVERAL, Fla. -- In the Rotation, Processing and Surge Facility, or RSPF, at NASA's Kennedy Space Center in Florida, workers make sure the final solid rocket booster segments are level, balanced and concentric, which is a required safety analysis. Workers also will perform a propellant grain inspection. The booster segments were manufactured at the ATK solid rocket booster plant in Promontory, Utah, and traveled to Kennedy along the Florida East Coast Railway. The booster segments will be stacked and then mated to space shuttle Atlantis and its external fuel tank in the Vehicle Assembly Building. The segments will be used for what currently is planned as the 'launch on need,' or potential rescue mission for the final shuttle flight, Endeavour's STS-134 mission. For information, visit www.nasa.gov_shuttle. Photo credit: NASA_Cory Huston

CAPE CANAVERAL, Fla. - At NASA's Kennedy Space Center in Florida, workers connect the solid rocket booster segment to two overhead cranes in the Rotation, Processing and Surge Facility. The segments will be used for space shuttle Atlantis on what currently is planned as the 'launch on need,' or potential rescue mission for the final shuttle flight, Endeavour's STS-134 mission. For information, visit www.nasa.gov_shuttle. Photo credit: NASA_Cory Huston

CAPE CANAVERAL, Fla. -- In the Rotation, Processing and Surge Facility at NASA's Kennedy Space Center in Florida, twin cranes hoist the first solid rocket booster segment into a vertical position. The segments will be used for space shuttle Atlantis on what currently is planned as the 'launch on need,' or potential rescue mission for the final shuttle flight, Endeavour's STS-134 mission. For information, visit www.nasa.gov_shuttle. Photo credit: NASA_Cory Huston

CAPE CANAVERAL, Fla. -- Twin cranes hoist the first solid rocket booster segment from a rail car in the Rotation, Processing and Surge Facility at NASA's Kennedy Space Center in Florida. It will then be rotated into a vertical position and placed a work stand. The segments will be used for space shuttle Atlantis on what currently is planned as the 'launch on need,' or potential rescue mission for the final shuttle flight, Endeavour's STS-134 mission. For information, visit www.nasa.gov_shuttle. Photo credit: NASA_Cory Huston

CAPE CANAVERAL, Fla. -- A work stand in the Rotation, Processing and Surge Facility at NASA's Kennedy Space Center in Florida awaits the arrival of the final solid rocket booster segment. The segments will be used for space shuttle Atlantis on what currently is planned as the 'launch on need,' or potential rescue mission for the final shuttle flight, Endeavour's STS-134 mission. For information, visit www.nasa.gov_shuttle. Photo credit: NASA_Cory Huston

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, workers prepare to lift and stack the final solid rocket booster segment in the Rotation, Processing and Surge Facility. The segments will be used for space shuttle Atlantis on what currently is planned as the 'launch on need,' or potential rescue mission for the final shuttle flight, Endeavour's STS-134 mission. For information, visit www.nasa.gov_shuttle. Photo credit: NASA_Cory Huston

CAPE CANAVERAL, Fla. -- Transportation and storage pallets in the Rotation, Processing and Surge Facility at NASA's Kennedy Space Center in Florida await the arrival of the final solid rocket booster segments. The segments will be used for space shuttle Atlantis on what currently is planned as the 'launch on need,' or potential rescue mission for the final shuttle flight, Endeavour's STS-134 mission. For information, visit www.nasa.gov_shuttle. Photo credit: NASA_Cory Huston

CAPE CANAVERAL, Fla. -- Under the watchful eyes of technicians, the solid rocket booster segment is lowered onto a work stand in the Rotation, Processing and Surge Facility at NASA's Kennedy Space Center in Florida. The segments will be used for space shuttle Atlantis on what currently is planned as the 'launch on need,' or potential rescue mission for the final shuttle flight, Endeavour's STS-134 mission. For information, visit www.nasa.gov_shuttle. Photo credit: NASA_Cory Huston

CAPE CANAVERAL, Fla. -- In the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, shuttle Endeavour is lowered into place where it is being attached to its external fuel tank and solid rocket boosters, already positioned on the mobile launcher platform. Endeavour and its STS-134 crew will deliver the Express Logistics Carrier-3, Alpha Magnetic Spectrometer, a high-pressure gas tank, additional spare parts for Dextre and micrometeoroid debris shields to the International Space Station. Endeavour's final launch is targeted for April 19 at 7:48 p.m. EDT. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- In the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, shuttle Endeavour is lowered into place where it will be attached to its external fuel tank and solid rocket boosters, already positioned on the mobile launcher platform. Endeavour and its STS-134 crew will deliver the Express Logistics Carrier-3, Alpha Magnetic Spectrometer, a high-pressure gas tank, additional spare parts for Dextre and micrometeoroid debris shields to the International Space Station. Endeavour's final launch is targeted for April 19 at 7:48 p.m. EDT. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. -- In the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, shuttle Endeavour is being lowered into place where it will be attached to its external fuel tank and solid rocket boosters, already positioned on the mobile launcher platform. Endeavour and its STS-134 crew will deliver the Express Logistics Carrier-3, Alpha Magnetic Spectrometer, a high-pressure gas tank, additional spare parts for Dextre and micrometeoroid debris shields to the International Space Station. Endeavour's final launch is targeted for April 19 at 7:48 p.m. EDT. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. -- In the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, workers attach an overhead crane to shuttle Endeavour. The crane will lift the spacecraft into a high bay where it will be attached to the waiting external fuel tank and solid rocket boosters. Endeavour and its STS-134 crew will deliver the Express Logistics Carrier-3, Alpha Magnetic Spectrometer, a high-pressure gas tank, additional spare parts for Dextre and micrometeoroid debris shields to the International Space Station. Endeavour's final launch is targeted for April 19 at 7:48 p.m. EDT. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. -- In Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, shuttle Endeavour is suspended vertically over the transfer aisle. The spacecraft will be moved into a high bay where it will be installed to the waiting external fuel tank and solid rocket boosters. Endeavour and its STS-134 crew will deliver the Express Logistics Carrier-3, Alpha Magnetic Spectrometer, a high-pressure gas tank, additional spare parts for Dextre and micrometeoroid debris shields to the International Space Station. Endeavour's final launch is targeted for April 19 at 7:48 p.m. EDT. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. -- In the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, shuttle Endeavour is being lowered into a high bay to be attached to its external fuel tank and solid rocket boosters, already positioned on the mobile launcher platform. Endeavour and its STS-134 crew will deliver the Express Logistics Carrier-3, Alpha Magnetic Spectrometer, a high-pressure gas tank, additional spare parts for Dextre and micrometeoroid debris shields to the International Space Station. Endeavour's final launch is targeted for April 19 at 7:48 p.m. EDT. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. -- In the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, shuttle Endeavour is lowered into place where it is being attached to its external fuel tank and solid rocket boosters, already positioned on the mobile launcher platform. Endeavour and its STS-134 crew will deliver the Express Logistics Carrier-3, Alpha Magnetic Spectrometer, a high-pressure gas tank, additional spare parts for Dextre and micrometeoroid debris shields to the International Space Station. Endeavour's final launch is targeted for April 19 at 7:48 p.m. EDT. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- In the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, shuttle Endeavour is lowered into place where it is being attached to its external fuel tank and solid rocket boosters, already positioned on the mobile launcher platform. Endeavour and its STS-134 crew will deliver the Express Logistics Carrier-3, Alpha Magnetic Spectrometer, a high-pressure gas tank, additional spare parts for Dextre and micrometeoroid debris shields to the International Space Station. Endeavour's final launch is targeted for April 19 at 7:48 p.m. EDT. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- In the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, shuttle Endeavour is lowered into place where it is being attached to its external fuel tank and solid rocket boosters, already positioned on the mobile launcher platform. Endeavour and its STS-134 crew will deliver the Express Logistics Carrier-3, Alpha Magnetic Spectrometer, a high-pressure gas tank, additional spare parts for Dextre and micrometeoroid debris shields to the International Space Station. Endeavour's final launch is targeted for April 19 at 7:48 p.m. EDT. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- In the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, workers attach an overhead crane to shuttle Endeavour. The crane will lift the spacecraft into a high bay where it will be attached to the waiting external fuel tank and solid rocket boosters. Endeavour and its STS-134 crew will deliver the Express Logistics Carrier-3, Alpha Magnetic Spectrometer, a high-pressure gas tank, additional spare parts for Dextre and micrometeoroid debris shields to the International Space Station. Endeavour's final launch is targeted for April 19 at 7:48 p.m. EDT. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. -- In the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, shuttle Endeavour is lowered into place where it will be attached to its external fuel tank and solid rocket boosters, already positioned on the mobile launcher platform. Endeavour and its STS-134 crew will deliver the Express Logistics Carrier-3, Alpha Magnetic Spectrometer, a high-pressure gas tank, additional spare parts for Dextre and micrometeoroid debris shields to the International Space Station. Endeavour's final launch is targeted for April 19 at 7:48 p.m. EDT. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. -- In the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, shuttle Endeavour is lowered into place where it will be attached to its external fuel tank and solid rocket boosters, already positioned on the mobile launcher platform. Endeavour and its STS-134 crew will deliver the Express Logistics Carrier-3, Alpha Magnetic Spectrometer, a high-pressure gas tank, additional spare parts for Dextre and micrometeoroid debris shields to the International Space Station. Endeavour's final launch is targeted for April 19 at 7:48 p.m. EDT. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. -- In Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, shuttle Endeavour is suspended vertically over the transfer aisle. The spacecraft will be moved into a high bay where it will be installed to the waiting external fuel tank and solid rocket boosters. Endeavour and its STS-134 crew will deliver the Express Logistics Carrier-3, Alpha Magnetic Spectrometer, a high-pressure gas tank, additional spare parts for Dextre and micrometeoroid debris shields to the International Space Station. Endeavour's final launch is targeted for April 19 at 7:48 p.m. EDT. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. -- In the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, workers attach an overhead crane to shuttle Endeavour. The crane will lift the spacecraft into a high bay where it will be attached to the waiting external fuel tank and solid rocket boosters. Endeavour and its STS-134 crew will deliver the Express Logistics Carrier-3, Alpha Magnetic Spectrometer, a high-pressure gas tank, additional spare parts for Dextre and micrometeoroid debris shields to the International Space Station. Endeavour's final launch is targeted for April 19 at 7:48 p.m. EDT. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. -- In Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, shuttle Endeavour is suspended vertically over the transfer aisle. The spacecraft will be moved into a high bay where it will be installed to the waiting external fuel tank and solid rocket boosters. Endeavour and its STS-134 crew will deliver the Express Logistics Carrier-3, Alpha Magnetic Spectrometer, a high-pressure gas tank, additional spare parts for Dextre and micrometeoroid debris shields to the International Space Station. Endeavour's final launch is targeted for April 19 at 7:48 p.m. EDT. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, media gather outside of Orbiter Processing Facility-2 to photograph space shuttle Endeavour's move, or "rollover," to the Vehicle Assembly Building (VAB). In the VAB, Endeavour will be lifted into a high bay where it will be attached to its external fuel tank and solid rocket boosters for its final and upcoming STS-134 mission. Endeavour and its STS-134 crew will deliver the Express Logistics Carrier-3, Alpha Magnetic Spectrometer, spare parts, a high-pressure gas tank, additional spare parts for Dextre and micrometeoroid debris shields to the International Space Station. Launch is targeted for April 19 at 7:48 p.m. EDT. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, space shuttle Endeavour approaches the Vehicle Assembly Building, or VAB, on its move from Orbiter Processing Facility-2 where it was processed for its final mission, STS-134. In the VAB, Endeavour will be lifted into a high bay where it will be joined to its external fuel tank and solid rocket boosters. Endeavour and its STS-134 crew will deliver the Express Logistics Carrier-3, Alpha Magnetic Spectrometer, a high-pressure gas tank, additional spare parts for Dextre and micrometeoroid debris shields to the International Space Station. Launch is targeted for April 19 at 7:48 p.m. EDT. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, space shuttle Endeavour approaches the Vehicle Assembly Building, or VAB, on its move from Orbiter Processing Facility-2 where it was processed for its final and upcoming STS-134 mission. In the VAB, Endeavour will be lifted into a high bay where it will be joined to its external fuel tank and solid rocket boosters. Endeavour and its STS-134 crew will deliver the Express Logistics Carrier-3, Alpha Magnetic Spectrometer, spare parts, a high-pressure gas tank, additional spare parts for Dextre and micrometeoroid debris shields to the International Space Station. Launch is targeted for April 19 at 7:48 p.m. EDT. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, media gather outside of Orbiter Processing Facility-2 to photograph space shuttle Endeavour's move, or "rollover," to the Vehicle Assembly Building (VAB). In the VAB, Endeavour will be lifted into a high bay where it will be attached to its external fuel tank and solid rocket boosters for its final and upcoming STS-134 mission. Endeavour and its STS-134 crew will deliver the Express Logistics Carrier-3, Alpha Magnetic Spectrometer, spare parts, a high-pressure gas tank, additional spare parts for Dextre and micrometeoroid debris shields to the International Space Station. Launch is targeted for April 19 at 7:48 p.m. EDT. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA

CAPE CANAVERAL, Fla. -- This panoramic image shows space shuttle Endeavour in the transfer aisle of the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, where workers have attached an overhead crane to the spacecraft. The crane will lift Endeavour into a high bay where it will be attached to its external fuel tank and solid rocket boosters for its final mission, STS-134. Endeavour and its STS-134 crew will deliver the Express Logistics Carrier-3, Alpha Magnetic Spectrometer, a high-pressure gas tank, additional spare parts for Dextre and micrometeoroid debris shields to the International Space Station. Launch is targeted for April 19 at 7:48 p.m. EDT. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Frankie Martin

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, media photograph space shuttle Endeavour's move, or "rollover," to the Vehicle Assembly Building (VAB) from Orbiter Processing Facility-2. In the VAB, Endeavour will be lifted into a high bay where it will be attached to its external fuel tank and solid rocket boosters for its final and upcoming STS-134 mission. Endeavour and its STS-134 crew will deliver the Express Logistics Carrier-3, Alpha Magnetic Spectrometer, spare parts, a high-pressure gas tank, additional spare parts for Dextre and micrometeoroid debris shields to the International Space Station. Launch is targeted for April 19 at 7:48 p.m. EDT. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, space shuttle Endeavour approaches the Vehicle Assembly Building, or VAB, on its move from Orbiter Processing Facility-2 where it was processed for its final mission, STS-134. In the VAB, Endeavour will be lifted into a high bay where it will be joined to its external fuel tank and solid rocket boosters. Endeavour and its STS-134 crew will deliver the Express Logistics Carrier-3, Alpha Magnetic Spectrometer, a high-pressure gas tank, additional spare parts for Dextre and micrometeoroid debris shields to the International Space Station. Launch is targeted for April 19 at 7:48 p.m. EDT. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. -- The STS-134 crew stands together on Launch Pad 39A in front of the towering external fuel tank and solid rocket boosters of space shuttle Endeavour, one day before its final flight, the STS-134 mission, to the International Space Station. From left are Mission Specialists Michael Fincke, Andrew Feustel; Pilot Greg H. Johnson, Commander Mark Kelly, European Space Agency astronaut Roberto Vittori and Mission Specialist Greg Chamitoff. Photo credit: NASA/Kim Shiflett Endeavour and its crew will deliver the Express Logistics Carrier-3, Alpha Magnetic Spectrometer-2 (AMS), a high-pressure gas tank and additional spare parts for the Dextre robotic helper to the station. This will be the final spaceflight for Endeavour. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Kim Shiflett

CAPE CANAVERAL, Fla. -- At NASA’s Kennedy Space Center in Florida, space shuttle Endeavour is secured to a transporter for its move, or "rollover" from Orbiter Processing Facility-2 to the Vehicle Assembly Building (VAB). In the VAB, Endeavour will be lifted into a high bay where it will be attached to its external fuel tank and solid rocket boosters for its final mission, STS-134. Endeavour and its STS-134 crew will deliver the Express Logistics Carrier-3, Alpha Magnetic Spectrometer, a high-pressure gas tank, additional spare parts for Dextre and micrometeoroid debris shields to the International Space Station. Launch is targeted for April 19 at 7:48 p.m. EDT. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, workers accompany space shuttle Endeavour as it is being transported from Orbiter Processing Facility-2 to the Vehicle Assembly Building (VAB). In the VAB, Endeavour will be lifted into a high bay where it will be attached to its external fuel tank and solid rocket boosters for its final mission, STS-134. Endeavour and its STS-134 crew will deliver the Express Logistics Carrier-3, Alpha Magnetic Spectrometer, a high-pressure gas tank, additional spare parts for Dextre and micrometeoroid debris shields to the International Space Station. Launch is targeted for April 19 at 7:48 p.m. EDT. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, space shuttle Endeavour is stationed in the transfer aisle of the Vehicle Assembly Building (VAB). In the VAB, Endeavour will be lifted into a high bay where it will be attached to its external fuel tank and solid rocket boosters for its final mission, STS-134. Endeavour and its STS-134 crew will deliver the Express Logistics Carrier-3, Alpha Magnetic Spectrometer, a high-pressure gas tank, additional spare parts for Dextre and micrometeoroid debris shields to the International Space Station. Launch is targeted for April 19 at 7:48 p.m. EDT. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, space shuttle Endeavour enters the transfer aisle of the Vehicle Assembly Building (VAB). In the VAB, Endeavour will be lifted into a high bay where it will be attached to its external fuel tank and solid rocket boosters for its final mission, STS-134. Endeavour and its STS-134 crew will deliver the Express Logistics Carrier-3, Alpha Magnetic Spectrometer, a high-pressure gas tank, additional spare parts for Dextre and micrometeoroid debris shields to the International Space Station. Launch is targeted for April 19 at 7:48 p.m. EDT. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, media gather outside of Orbiter Processing Facility-2 to photograph space shuttle Endeavour's move, or "rollover," to the Vehicle Assembly Building (VAB). In the VAB, Endeavour will be lifted into a high bay where it will be attached to its external fuel tank and solid rocket boosters for its final and upcoming STS-134 mission. Endeavour and its STS-134 crew will deliver the Express Logistics Carrier-3, Alpha Magnetic Spectrometer, spare parts, a high-pressure gas tank, additional spare parts for Dextre and micrometeoroid debris shields to the International Space Station. Launch is targeted for April 19 at 7:48 p.m. EDT. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA

CAPE CANAVERAL, Fla. - At the Jay Jay Rail Yard in Titusville, Fla., a NASA Railroad mechanic checks out the brakes on a Union Pacific rail car carrying one of the last space shuttle solid rocket booster segments. The NASA train will transport the segments on the last leg of their journey into NASA's Kennedy Space Center. Six cars transported the segments along the Florida East Coast Railway, which began at the ATK solid rocket booster plant in Promontory, Utah. The booster segments will be used for shuttle Atlantis on what currently is planned as the 'launch on need,' or potential rescue mission for the final shuttle flight, Endeavour's STS-134 mission. For information, visit www.nasa.gov_shuttle. Photo credit: NASA_Jim Grossmann

CAPE CANAVERAL, Fla. - At the Jay Jay Rail Yard in Titusville, Fla., a NASA Railroad mechanic checks out the brakes on a Union Pacific rail car carrying one of the last space shuttle solid rocket booster segments. The NASA train will transport the segments on the last leg of their journey into NASA's Kennedy Space Center. Six cars transported the segments along the Florida East Coast Railway, which began at the ATK solid rocket booster plant in Promontory, Utah. The booster segments will be used for shuttle Atlantis on what currently is planned as the 'launch on need,' or potential rescue mission for the final shuttle flight, Endeavour's STS-134 mission. For information, visit www.nasa.gov_shuttle. Photo credit: NASA_Jim Grossman

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, the Space Shuttle Program's final solid rocket booster assembly -- the right-hand forward -- is being delivered to the transfer aisle of the Vehicle Assembly Building (VAB). The right and left forward assemblies, which are refurbished and processed at Kennedy, are comprised of three components -- nose cap, frustum and forward skirt. Inside the VAB, the boosters will be stacked, then joined to an external fuel tank and space shuttle Atlantis for what currently is planned as the "launch on need," or potential rescue mission, for Endeavour's STS-134 mission to the International Space Station targeted to launch in February, 2011. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, the Space Shuttle Program's final solid rocket booster assembly -- the right-hand forward -- is being transported from Kennedy's Assembly Refurbishment Facility to the Vehicle Assembly Building (VAB). The right and left forward assemblies, which are refurbished and processed at Kennedy, are comprised of three components -- nose cap, frustum and forward skirt. Inside the VAB, the boosters will be stacked, then joined to an external fuel tank and space shuttle Atlantis for what currently is planned as the "launch on need," or potential rescue mission, for Endeavour's STS-134 mission to the International Space Station targeted to launch in February, 2011. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, a crawler-transporter moves a mobile launcher platform with two solid rocket boosters perched on top from the Vehicle Assembly Building's (VAB) High Bay 1 to High Bay 3. Inside the VAB, the boosters will be joined to an external fuel tank next month in preparation for space shuttle Endeavour's STS-134 mission to the International Space Station targeted to launch in February, 2011. For more information visit: http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html Photo credit: NASA/Ben Cooper

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, the Space Shuttle Program's final solid rocket booster assembly -- the right-hand forward -- is being delivered to the Vehicle Assembly Building (VAB) from Kennedy's Assembly Refurbishment Facility. The right and left forward assemblies, which are refurbished and processed at Kennedy, are comprised of three components -- nose cap, frustum and forward skirt. Inside the VAB, the boosters will be stacked, then joined to an external fuel tank and space shuttle Atlantis for what currently is planned as the "launch on need," or potential rescue mission, for Endeavour's STS-134 mission to the International Space Station targeted to launch in February, 2011. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, a crawler-transporter moves a mobile launcher platform with two solid rocket boosters perched on top from the Vehicle Assembly Building's (VAB) High Bay 1 to High Bay 3. Inside the VAB, the boosters will be joined to an external fuel tank next month in preparation for space shuttle Endeavour's STS-134 mission to the International Space Station targeted to launch in February, 2011. For more information visit: http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html Photo credit: NASA/Ben Cooper

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, the Space Shuttle Program's final solid rocket booster assembly -- the right-hand forward -- is being moved to the Vehicle Assembly Building (VAB) from Kennedy's Assembly Refurbishment Facility. The right and left forward assemblies, which are refurbished and processed at Kennedy, are comprised of three components -- nose cap, frustum and forward skirt. Inside the VAB, the boosters will be stacked, then joined to an external fuel tank and space shuttle Atlantis for what currently is planned as the "launch on need," or potential rescue mission, for Endeavour's STS-134 mission to the International Space Station targeted to launch in February, 2011. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, a crawler-transporter moves a mobile launcher platform with two solid rocket boosters perched on top from the Vehicle Assembly Building's (VAB) High Bay 1 to High Bay 3. Inside the VAB, the boosters will be joined to an external fuel tank next month in preparation for space shuttle Endeavour's STS-134 mission to the International Space Station targeted to launch in February, 2011. For more information visit: http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, the Space Shuttle Program's final solid rocket booster assembly -- the right-hand forward -- is on its transport, ready to be moved from Kennedy's Assembly Refurbishment Facility to the Vehicle Assembly Building (VAB). The right and left forward assemblies, which are refurbished and processed at Kennedy, are comprised of three components -- nose cap, frustum and forward skirt. Inside the VAB, the boosters will be stacked, then joined to an external fuel tank and space shuttle Atlantis for what currently is planned as the "launch on need," or potential rescue mission, for Endeavour's STS-134 mission to the International Space Station targeted to launch in February, 2011. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, a crawler-transporter moves a mobile launcher platform with two solid rocket boosters perched on top from the Vehicle Assembly Building's (VAB) High Bay 1 to High Bay 3. Inside the VAB, the boosters will be joined to an external fuel tank next month in preparation for space shuttle Endeavour's STS-134 mission to the International Space Station targeted to launch in February, 2011. For more information visit: http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html Photo credit: NASA/Ben Cooper

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, a crawler-transporter moves a mobile launcher platform with two solid rocket boosters perched on top from the Vehicle Assembly Building's (VAB) High Bay 1 to High Bay 3. Inside the VAB, the boosters will be joined to an external fuel tank next month in preparation for space shuttle Endeavour's STS-134 mission to the International Space Station targeted to launch in February, 2011. For more information visit: http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html Photo credit: NASA/Ben Cooper

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, the Space Shuttle Program's final solid rocket booster assembly -- the right-hand forward -- is being transported from Kennedy's Assembly Refurbishment Facility to the Vehicle Assembly Building (VAB). The right and left forward assemblies, which are refurbished and processed at Kennedy, are comprised of three components -- nose cap, frustum and forward skirt. Inside the VAB, the boosters will be stacked, then joined to an external fuel tank and space shuttle Atlantis for what currently is planned as the "launch on need," or potential rescue mission, for Endeavour's STS-134 mission to the International Space Station targeted to launch in February, 2011. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, a crawler-transporter moves a mobile launcher platform with two solid rocket boosters perched on top from the Vehicle Assembly Building's (VAB) High Bay 1 to High Bay 3. Inside the VAB, the boosters will be joined to an external fuel tank next month in preparation for space shuttle Endeavour's STS-134 mission to the International Space Station targeted to launch in February, 2011. For more information visit: http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. -- In the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, a worker monitors external fuel tank, ET-122, for space shuttle Endeavour's STS-134 mission, as it is lifted from its test cell. When lowered in place, the tank will be attached to the solid rocket boosters on the mobile launcher platform. Endeavour and its crew will deliver the Express Logistics Carrier-3 and the Alpha Magnetic Spectrometer to the International Space Station. Launch is targeted for April 19. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. -- In the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, workers observe the external fuel tank, ET-122, for space shuttle Endeavour's STS-134 mission, as it is lifted from its test cell. When lowered in place, the tank will be attached to the solid rocket boosters on the mobile launcher platform. Endeavour and its crew will deliver the Express Logistics Carrier-3 and the Alpha Magnetic Spectrometer to the International Space Station. Launch is targeted for April 19. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. -- In the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, workers monitor the progress of external fuel tank, ET-122, for space shuttle Endeavour's STS-134 mission as it is being attached to the twin solid rocket boosters on the mobile launcher platform. Endeavour and its crew will deliver the Express Logistics Carrier-3 and the Alpha Magnetic Spectrometer to the International Space Station. Launch is targeted for April 19. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. -- In the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, external fuel tank, ET-122, for space shuttle Endeavour's STS-134 mission, is being lifted from its test cell. When lowered in place, the tank will be attached to the solid rocket boosters on the mobile launcher platform. Endeavour and its crew will deliver the Express Logistics Carrier-3 and the Alpha Magnetic Spectrometer to the International Space Station. Launch is targeted for April 19. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Jack Pfaller

CAPE CANAVERAL, Fla. -- In the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, external fuel tank, ET-122, for space shuttle Endeavour's STS-134 mission, is ready to be lifted from its test cell. When lowered in place, the tank will be attached to the solid rocket boosters on the mobile launcher platform. Endeavour and its crew will deliver the Express Logistics Carrier-3 and the Alpha Magnetic Spectrometer to the International Space Station. Launch is targeted for April 19. For more information visit, http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts134/index.html. Photo credit: NASA/Jack Pfaller