CAPE CANAVERAL, Fla. – Space shuttle Endeavour is ready for the rollover from Orbiter Processing Facility 2 to the Vehicle Assembly Building at NASA's Kennedy Space Center, Fla. The first motion of the shuttle out of its hangar was at 6:56 a.m. EDT. In the VAB, Endeavour will be lifted into High Bay 1 and mated to the external fuel tank and solid rocket boosters already installed on the mobile launcher platform. Endeavour is scheduled to roll out to Launch Pad 39B in about a week. Endeavour will be prepared on the pad for liftoff in the unlikely event that a rescue mission is necessary following space shuttle Atlantis' launch on the STS-125 mission to service the Hubble Space Telescope. After Atlantis is cleared to land, Endeavour will move to Launch Pad 39A for its upcoming STS-127 mission to the International Space Station, targeted to launch in mid-June. Photo credit: NASA/Jim Grossmann

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CAPE CANAVERAL, Fla. – Space shuttle Endeavour is ready for the rollover from Orbiter Processing Facility 2 to the Vehicle Assembly Building at NASA's Kennedy Space Center, Fla. The first motion of the shuttle out of its hangar was at 6:56 a.m. EDT. In the VAB, Endeavour will be lifted into High Bay 1 and mated to the external fuel tank and solid rocket boosters already installed on the mobile launcher platform. Endeavour is scheduled to roll out to Launch Pad 39B in about a week. Endeavour will be prepared on the pad for liftoff in the unlikely event that a rescue mission is necessary following space shuttle Atlantis' launch on the STS-125 mission to service the Hubble Space Telescope. After Atlantis is cleared to land, Endeavour will move to Launch Pad 39A for its upcoming STS-127 mission to the International Space Station, targeted to launch in mid-June. Photo credit: NASA/Jim Grossmann

STS-133 DISCOVERY ROLLOVER FROM OPF-3 TO VAB

CAPE CANAVERAL, Fla. – Space shuttle Endeavour begins its move from Orbiter Processing Facility 2 to the Vehicle Assembly Building at NASA's Kennedy Space Center, Fla. The first motion of the shuttle out of its hangar was at 6:56 a.m. EDT. In the VAB, Endeavour will be lifted into High Bay 1 and mated to the external fuel tank and solid rocket boosters already installed on the mobile launcher platform. Endeavour is scheduled to roll out to Launch Pad 39B in about a week. Endeavour will be prepared on the pad for liftoff in the unlikely event that a rescue mission is necessary following space shuttle Atlantis' launch on the STS-125 mission to service the Hubble Space Telescope. After Atlantis is cleared to land, Endeavour will move to Launch Pad 39A for its upcoming STS-127 mission to the International Space Station, targeted to launch in mid-June. Photo credit: NASA/Jim Grossmann

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CAPE CANAVERAL, Fla. – Space shuttle Endeavour arrives at the Vehicle Assembly Building at NASA's Kennedy Space Center, Fla. The first motion of the shuttle out of Orbiter Processing Facility 2 was at 6:56 a.m. EDT. In the VAB, Endeavour will be lifted into High Bay 1 and mated to the external fuel tank and solid rocket boosters already installed on the mobile launcher platform. Endeavour is scheduled to roll out to Launch Pad 39B in about a week. Endeavour will be prepared on the pad for liftoff in the unlikely event that a rescue mission is necessary following space shuttle Atlantis' launch on the STS-125 mission to service the Hubble Space Telescope. After Atlantis is cleared to land, Endeavour will move to Launch Pad 39A for its upcoming STS-127 mission to the International Space Station, targeted to launch in mid-June. Photo credit: NASA/Jim Grossmann

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CAPE CANAVERAL, Fla. – Space shuttle Endeavour is transported from Orbiter Processing Facility 2 to the Vehicle Assembly Building at NASA's Kennedy Space Center, Fla. The first motion of the shuttle out of its hangar was at 6:56 a.m. EDT. In the VAB, Endeavour will be lifted into High Bay 1 and mated to the external fuel tank and solid rocket boosters already installed on the mobile launcher platform. Endeavour is scheduled to roll out to Launch Pad 39B in about a week. Endeavour will be prepared on the pad for liftoff in the unlikely event that a rescue mission is necessary following space shuttle Atlantis' launch on the STS-125 mission to service the Hubble Space Telescope. After Atlantis is cleared to land, Endeavour will move to Launch Pad 39A for its upcoming STS-127 mission to the International Space Station, targeted to launch in mid-June. Photo credit: NASA/Jim Grossmann

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CAPE CANAVERAL, Fla. – Workers accompany space shuttle Endeavour as it rolls from Orbiter Processing Facility 2 to the Vehicle Assembly Building at NASA’s Kennedy Space Center, Fla. In the VAB, Endeavour will be lifted into High Bay 1 and mated to the external fuel tank and solid rocket boosters already installed on the mobile launcher platform. Endeavour is scheduled to roll out to Launch Pad 39B in about a week. Endeavour will be prepared on the pad for liftoff in the unlikely event that a rescue mission is necessary following space shuttle Atlantis' launch on the STS-125 mission to service the Hubble Space Telescope. After Atlantis is cleared to land, Endeavour will move to Launch Pad 39A for its upcoming STS-127 mission to the International Space Station, targeted to launch in mid-June. Photo credit: NASA/Jim Grossmann

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CAPE CANAVERAL, Fla. – Space shuttle Endeavour rolls into the Vehicle Assembly Building at NASA's Kennedy Space Center, Fla. The first motion of the shuttle out of Orbiter Processing Facility 2 was at 6:56 a.m. EDT. In the VAB, Endeavour will be lifted into High Bay 1 and mated to the external fuel tank and solid rocket boosters already installed on the mobile launcher platform. Endeavour is scheduled to roll out to Launch Pad 39B in about a week. Endeavour will be prepared on the pad for liftoff in the unlikely event that a rescue mission is necessary following space shuttle Atlantis' launch on the STS-125 mission to service the Hubble Space Telescope. After Atlantis is cleared to land, Endeavour will move to Launch Pad 39A for its upcoming STS-127 mission to the International Space Station, targeted to launch in mid-June. Photo credit: NASA/Jim Grossmann

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CAPE CANAVERAL, Fla. – In the transfer aisle of the Vehicle Assembly Building at NASA's Kennedy Space Center, Fla., space shuttle Endeavour is in position to be lifted into a high bay. The first motion of the shuttle out of Orbiter Processing Facility 2 was at 6:56 a.m. EDT. In the VAB, Endeavour will be lifted into High Bay 1 and mated to the external fuel tank and solid rocket boosters already installed on the mobile launcher platform. Endeavour is scheduled to roll out to Launch Pad 39B in about a week. Endeavour will be prepared on the pad for liftoff in the unlikely event that a rescue mission is necessary following space shuttle Atlantis' launch on the STS-125 mission to service the Hubble Space Telescope. After Atlantis is cleared to land, Endeavour will move to Launch Pad 39A for its upcoming STS-127 mission to the International Space Station, targeted to launch in mid-June. Photo credit: NASA/Jim Grossmann

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CAPE CANAVERAL, Fla. – Space shuttle Endeavour is rolled from Orbiter Processing Facility 2 to the Vehicle Assembly Building at NASA's Kennedy Space Center, Fla. The first motion of the shuttle out of its hangar was at 6:56 a.m. EDT. In the VAB, Endeavour will be lifted into High Bay 1 and mated to the external fuel tank and solid rocket boosters already installed on the mobile launcher platform. Endeavour is scheduled to roll out to Launch Pad 39B in about a week. Endeavour will be prepared on the pad for liftoff in the unlikely event that a rescue mission is necessary following space shuttle Atlantis' launch on the STS-125 mission to service the Hubble Space Telescope. After Atlantis is cleared to land, Endeavour will move to Launch Pad 39A for its upcoming STS-127 mission to the International Space Station, targeted to launch in mid-June. Photo credit: NASA/Jim Grossmann

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CAPE CANAVERAL, Fla. -- In the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, space shuttle Discovery is lifted away from its transporter above the transfer aisle. The shuttle will be raised to a vertical position and lifted into high bay 3 where it will be mated with its external fuel tank and solid rocket boosters on the mobile launcher platform. After additional preparations are made, the shuttle will be rolled out to Launch Pad 39A for a targeted launch on Feb. 12. Discovery will carry the final starboard truss (S6) in the assembly of the International Space Station. Photo credit: NASA/Troy Cryder

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CAPE CANAVERAL, Fla. -- In the Vehicle Assembly Building transfer aisle at NASA's Kennedy Space Center in Florida, space shuttle Discovery is viewed from underneath as it is lifted from its transporter by an overhead crane. The shuttle will be raised to a vertical position and lifted into high bay 3 where it will be mated with its external fuel tank and solid rocket boosters on the mobile launcher platform. After additional preparations are made, the shuttle will be rolled out to Launch Pad 39A for a targeted launch on Feb. 12. Discovery will carry the final starboard truss (S6) in the assembly of the International Space Station. Photo credit: NASA/Troy Cryder

CAPE CANAVERAL, Fla. – Following the rollover from the OPF, the orbiter Columbia is prepared for mating with the ET/SRB stack in the VAB. Columbia is scheduled for launch in late July 1989. Photo credit: NASA

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KENNEDY SPACE CENTER, FLA. - The orbiter Discovery, sitting on an orbiter transporter, slowly backs out of NASA's Orbiter Processing Facility to begin the rollover to the Vehicle Assembly Building (VAB). The rollover marks the start of the journey to the launch pad and, ultimately, launch. Once inside the VAB, Discovery will be raised to vertical and lifted up and over into high bay 3 for stacking with its redesigned external tank and twin solid rocket boosters. The rollout of Space Shuttle Discovery to Launch Pad 39B is expected in approximately a week. Launch of Discovery on mission STS-121 is scheduled to take place in a window extending July 1 to July 19. Photo credit: NASA/Jack Pfaller

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KENNEDY SPACE CENTER, FLA. - The orbiter Discovery, sitting on an orbiter transporter, turns the corner after gliding out of NASA's Orbiter Processing Facility to begin the rollover to the Vehicle Assembly Building (VAB). The rollover marks the start of the journey to the launch pad and, ultimately, launch. Once inside the VAB, Discovery will be raised to vertical and lifted up and over into high bay 3 for stacking with its redesigned external tank and twin solid rocket boosters. The rollout of Space Shuttle Discovery to Launch Pad 39B is expected in approximately a week. Launch of Discovery on mission STS-121 is scheduled to take place in a window extending July 1 to July 19. Photo credit: NASA/Jim Grossmann

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KENNEDY SPACE CENTER, FLA. - The orbiter Discovery, sitting on an orbiter transporter, slowly backs out of NASA's Orbiter Processing Facility to begin the rollover to the Vehicle Assembly Building (VAB). The rollover marks the start of the journey to the launch pad and, ultimately, launch. Once inside the VAB, Discovery will be raised to vertical and lifted up and over into high bay 3 for stacking with its redesigned external tank and twin solid rocket boosters. The rollout of Space Shuttle Discovery to Launch Pad 39B is expected in approximately a week. Launch of Discovery on mission STS-121 is scheduled to take place in a window extending July 1 to July 19. Photo credit: NASA/Jack Pfaller

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KENNEDY SPACE CENTER, FLA. - Workers crowd around the orbiter Discovery, sitting on an orbiter transporter, as it glides out of NASA's Orbiter Processing Facility to begin the rollover to the Vehicle Assembly Building (VAB). The rollover marks the start of the journey to the launch pad and, ultimately, launch. Once inside the VAB, Discovery will be raised to vertical and lifted up and over into high bay 3 for stacking with its redesigned external tank and twin solid rocket boosters. The rollout of Space Shuttle Discovery to Launch Pad 39B is expected in approximately a week. Launch of Discovery on mission STS-121 is scheduled to take place in a window extending July 1 to July 19. Photo credit: NASA/Jim Grossmann

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KENNEDY SPACE CENTER, FLA. - The orbiter Discovery rests in the transfer aisle of the Vehicle Assembly Building (VAB) after rollover from the Orbiter Processing Facility (OPF) bay 3. This marks a major milestone in the march to Return to Flight. First motion in the OPF was at 1:29 a.m. EST. Inside the VAB, Discovery will be mated to the External Tank_Solid Rocket Booster assembly for Return to Flight mission STS-114. After all umbilicals have been connected, workers will perform an electrical and mechanical verification of the mated interfaces to verify all critical vehicle connections. A Space Shuttle interface test is performed to verify vehicle interfaces and vehicle-to-ground interfaces. The launch processing system is used to control and monitor orbiter systems as required. Space Shuttle Discovery will roll out to Launch Pad 39B approximately one week after the rollover to the VAB. The launch window for mission STS-114 is May 15 to June 3.

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CAPE CANAVERAL, Fla. -- Space shuttle Discovery rolls out of Orbiter Processing Facility 3 at NASA's Kennedy Space Center in Florida to head to the Vehicle Assembly Building (in the background). First motion was at 2:30 p.m. EST. In the VAB, Discovery will be attached to its external fuel tank and twin solid rocket boosters. After additional preparations are made, the shuttle will be rolled out to Launch Pad 39A for a targeted launch to the International Space Station on Feb. 12. Photo credit: NASA/Jim Grossmann

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CAPE CANAVERAL, Fla. -- Aboard its transporter, space shuttle Discovery rolls into the transfer aisle of the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida. Discovery left Orbiter Processing Facility 3 at 2:30 p.m. EST. In the VAB, Discovery will be attached to its external fuel tank and twin solid rocket boosters. After additional preparations are made, the shuttle will be rolled out to Launch Pad 39A for a targeted launch to the International Space Station on Feb. 12. Photo credit: NASA/Jim Grossmann

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CAPE CANAVERAL, Fla. -- In the Vehicle Assembly Building transfer aisle at NASA's Kennedy Space Center in Florida, space shuttle Discovery is lifted from its transporter by an overhead crane. The shuttle will be raised to a vertical position and lifted into high bay 3 where it will be mated with its external fuel tank and solid rocket boosters on the mobile launcher platform. After additional preparations are made, the shuttle will be rolled out to Launch Pad 39A for a targeted launch on Feb. 12. Discovery will carry the final starboard truss (S6) in the assembly of the International Space Station. Photo credit: NASA/Troy Cryder

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CAPE CANAVERAL, Fla. -- In the Vehicle Assembly Building transfer aisle at NASA's Kennedy Space Center in Florida, space shuttle Discovery is lifted from its transporter by an overhead crane. The shuttle will be raised to a vertical position and lifted into high bay 3 where it will be mated with its external fuel tank and solid rocket boosters on the mobile launcher platform. After additional preparations are made, the shuttle will be rolled out to Launch Pad 39A for a targeted launch on Feb. 12. Discovery will carry the final starboard truss (S6) in the assembly of the International Space Station. Photo credit: NASA/Troy Cryder

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CAPE CANAVERAL, Fla. -- In Orbiter Processing Facility 3 at NASA's Kennedy Space Center in Florida, space shuttle Discovery is lowered onto a transporter for its move to the Vehicle Assembly Building at NASA's Kennedy Space Center. In the VAB, Discovery will be attached to its external fuel tank and twin solid rocket boosters. After additional preparations are made, the shuttle will be rolled out to Launch Pad 39A for a targeted launch to the International Space Station on Feb. 12. Photo credit: NASA/Jim Grossmann

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CAPE CANAVERAL, Fla. -- In the Vehicle Assembly Building transfer aisle at NASA's Kennedy Space Center in Florida, space shuttle Discovery is lifted from its transporter by an overhead crane. The shuttle will be raised to a vertical position and lifted into high bay 3 where it will be mated with its external fuel tank and solid rocket boosters on the mobile launcher platform. After additional preparations are made, the shuttle will be rolled out to Launch Pad 39A for a targeted launch on Feb. 12. Discovery will carry the final starboard truss (S6) in the assembly of the International Space Station. Photo credit: NASA/Troy Cryder

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CAPE CANAVERAL, Fla. -- In the Vehicle Assembly Building transfer aisle at NASA's Kennedy Space Center in Florida, space shuttle Discovery is lifted from its transporter by an overhead crane. The shuttle will be raised to a vertical position and lifted into high bay 3 where it will be mated with its external fuel tank and solid rocket boosters on the mobile launcher platform. After additional preparations are made, the shuttle will be rolled out to Launch Pad 39A for a targeted launch on Feb. 12. Discovery will carry the final starboard truss (S6) in the assembly of the International Space Station. Photo credit: NASA/Troy Cryder

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CAPE CANAVERAL, Fla. -- Space shuttle Discovery rolls out of Orbiter Processing Facility 3 at NASA's Kennedy Space Center in Florida to head to the Vehicle Assembly Building at NASA's Kennedy Space Center. First motion was at 2:30 p.m. EST. In the VAB, Discovery will be attached to its external fuel tank and twin solid rocket boosters. After additional preparations are made, the shuttle will be rolled out to Launch Pad 39A for a targeted launch to the International Space Station on Feb. 12. Photo credit: NASA/Jim Grossmann

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CAPE CANAVERAL, Fla. -- After rolling out of Orbiter Processing Facility 3 at NASA's Kennedy Space Center in Florida, space shuttle Discovery turns toward the Vehicle Assembly Building. First motion was at 2:30 p.m. EST. In the VAB, Discovery will be attached to its external fuel tank and twin solid rocket boosters. After additional preparations are made, the shuttle will be rolled out to Launch Pad 39A for a targeted launch to the International Space Station on Feb. 12. Photo credit: NASA/Jim Grossmann

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Carried atop an orbiter transporter, the Space Shuttle orbiter Atlantis rolls out of Orbiter Processing Facility Bay 3, in background, en route to the Vehicle Assembly Building (VAB). This photo was taken from the roof of the VAB. The "rollover" of the orbiter is one of the prelaunch milestones. Atlantis is being readied for the next mission, STS-86, which is targeted for a September launch. STS-86 will be the seventh of nine planned dockings of the Space Shuttle orbiter with the Russian Space Station Mir

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Carried atop an orbiter transporter, the Space Shuttle orbiter Atlantis makes the short journey from Orbiter Processing Facility Bay 3 to the Vehicle Assembly Building (VAB). This photo was taken from the roof of the 525-foot-tall VAB. The "rollover" of the orbiter is one of the prelaunch milestones. Atlantis is being readied for the next mission, STS-86, which is targeted for a September launch. STS-86 will be the seventh of nine planned dockings of the Space Shuttle orbiter with the Russian Space Station Mir

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Carried atop an orbiter transporter, the Space Shuttle orbiter Atlantis makes the short journey from Orbiter Processing Facility Bay 3 to the Vehicle Assembly Building (VAB). This photo was taken from the roof of the 525-foot-tall VAB. The "rollover" of the orbiter is one of the prelaunch milestones. Atlantis is being readied for the next mission, STS-86, which is targeted for a September launch. STS-86 will be the seventh of nine planned dockings of the Space Shuttle orbiter with the Russian Space Station Mir

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Carried atop an orbiter transporter, the Space Shuttle orbiter Atlantis rolls into the transfer aisle of the Vehicle Assembly Building (VAB) . The "rollover" of the orbiter from the Orbiter Processing Facility to the nearby VAB is one of the prelaunch milestones. Atlantis is being readied for the next mission, STS-86, which is targeted for a September launch. STS-86 will be the seventh of nine planned dockings of the Space Shuttle orbiter with the Russian Space Station Mir

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KENNEDY SPACE CENTER, FLA. - As the orbiter Discovery, sitting on an orbiter transporter, moves away from NASA's Orbiter Processing Facility toward the Vehicle Assembly Building (VAB), workers accompany the vehicle. The rollover to the VAB marks the start of the journey to the launch pad and, ultimately, launch. Once inside the VAB, Discovery will be raised to vertical and lifted up and over into high bay 3 for stacking with its redesigned external tank and twin solid rocket boosters. The rollout of Space Shuttle Discovery to Launch Pad 39B is expected in approximately a week. Launch of Discovery on mission STS-121 is scheduled to take place in a window extending July 1 to July 19. Photo credit: NASA/Jim Grossmann

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KENNEDY SPACE CENTER, FLA. - The orbiter Discovery, on top of an orbiter transporter, heads toward NASA's Vehicle Assembly Building (VAB) after leaving the Orbiter Processing Facility. The rollover to the VAB marks the start of the journey to the launch pad and, ultimately, launch. Once inside the VAB, Discovery will be raised to vertical and lifted up and over into high bay 3 for stacking with its redesigned external tank and twin solid rocket boosters. The rollout of Space Shuttle Discovery to Launch Pad 39B is expected in approximately a week. Launch of Discovery on mission STS-121 is scheduled to take place in a window extending July 1 to July 19. Photo credit: NASA/Jim Grossmann

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KENNEDY SPACE CENTER, FLA. - The orbiter Discovery, sitting on an orbiter transporter, turns away from NASA's Orbiter Processing Facility to roll toward the Vehicle Assembly Building (VAB). The rollover to the VAB marks the start of the journey to the launch pad and, ultimately, launch. Once inside the VAB, Discovery will be raised to vertical and lifted up and over into high bay 3 for stacking with its redesigned external tank and twin solid rocket boosters. The rollout of Space Shuttle Discovery to Launch Pad 39B is expected in approximately a week. Launch of Discovery on mission STS-121 is scheduled to take place in a window extending July 1 to July 19. Photo credit: NASA/Jim Grossmann

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KENNEDY SPACE CENTER, FLA. - As the orbiter Discovery, sitting on an orbiter transporter, moves away from NASA's Orbiter Processing Facility toward the Vehicle Assembly Building (VAB), workers accompany the vehicle. The rollover to the VAB marks the start of the journey to the launch pad and, ultimately, launch. Once inside the VAB, Discovery will be raised to vertical and lifted up and over into high bay 3 for stacking with its redesigned external tank and twin solid rocket boosters. The rollout of Space Shuttle Discovery to Launch Pad 39B is expected in approximately a week. Launch of Discovery on mission STS-121 is scheduled to take place in a window extending July 1 to July 19. Photo credit: NASA/Jim Grossmann

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KENNEDY SPACE CENTER, FLA. - The orbiter Discovery, on top of an orbiter transporter, rolls into NASA's Vehicle Assembly Building (VAB) after leaving the Orbiter Processing Facility. The rollover to the VAB marks the start of the journey to the launch pad and, ultimately, launch. Once inside the VAB, Discovery will be raised to vertical and lifted up and over into high bay 3 for stacking with its redesigned external tank and twin solid rocket boosters. The rollout of Space Shuttle Discovery to Launch Pad 39B is expected in approximately a week. Launch of Discovery on mission STS-121 is scheduled to take place in a window extending July 1 to July 19. Photo credit: NASA/Jim Grossmann

STS-26 Discovery, Orbiter Vehicle (OV) 103, rollover at KSC

S88-42092 (15 July 1988) --- STS-26 Discovery, Orbiter Vehicle (OV) 103, rollover at Kennedy Space Center (KSC) is closely monitored by engineers and technicians in the late stages of the move from the orbiter processing facility (OPF) to the vehicle assembly building (VAB) as preflight preparations continue. A large crowd of KSC employees and other spectators watches in the background as OV-103, supported by its landing gear, is pulled toward VAB (background). While in the VAB, OV-103 will be mated to two solid rocket boosters (SRBs) and an external fuel tank.

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KENNEDY SPACE CENTER, FLA. -- The orbiter Atlantis, on top of its transporter, comes to a stop in the transfer aisle of the Vehicle Assembly Building after the rollover from the Orbiter Processing Facility. First motion out of OPF was at 6:19 a.m. EST. Once in the VAB, Atlantis will be lifted into high bay 1 and mated with the external tank and solid rocket boosters already in place on the mobile launcher platform. The rollover signals the start of the journey to the launch pad for liftoff on mission STS-117 targeted for March 15. The mission is the 21st to the International Space Station and will deliver the S3/S4 starboard truss segments. Photo credit: NASA/Kim Shiflett

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KENNEDY SPACE CENTER, FLA. - Inside the Vehicle Assembly Building, the media talk with Bill Readdy, associate administrator of NASA’s Space Operations Mission Directorate, after the orbiter Discovery’s rollover from the Orbiter Processing Facility bay 3. The rollover marks a major milestone in the march to Return to Flight. First motion in the OPF was at 1:29 a.m. EST. Inside the VAB, Discovery will be mated to the External Tank_Solid Rocket Booster assembly for Return to Flight mission STS-114. After all umbilicals have been connected, workers will perform an electrical and mechanical verification of the mated interfaces to verify all critical vehicle connections. A Space Shuttle interface test is performed to verify vehicle interfaces and vehicle-to-ground interfaces. The launch processing system is used to control and monitor orbiter systems as required. Space Shuttle Discovery will roll out to Launch Pad 39B approximately one week after the rollover to the VAB. The launch window for mission STS-114 is May 15 to June 3.

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CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, shuttle Discovery begins to back out of Orbiter Processing Facility-3 during a move called "rollover" to the nearby Vehicle Assembly Building (VAB). Once inside the VAB, the shuttle will be joined to its solid rocket boosters and external fuel tank. Later this month, Discovery is scheduled to "rollout" to Launch Pad 39A for its launch to the International Space Station on the STS-133 mission. Targeted to liftoff Nov. 1, Discovery will take the Permanent Multipurpose Module (PMM) packed with supplies and critical spare parts, as well as Robonaut 2 (R2) to the station. Photo credit: NASA/Dimitri Gerondidakis

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CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, shuttle Discovery is ushered into the Vehicle Assembly Building (VAB) from Orbiter Processing Facility-3 during a move known as "rollover." Once inside the VAB, the shuttle will be joined to its solid rocket boosters and external fuel tank. Later this month, Discovery is scheduled to "rollout" to Launch Pad 39A for its launch to the International Space Station on the STS-133 mission. Targeted to liftoff Nov. 1, Discovery will take the Permanent Multipurpose Module (PMM) packed with supplies and critical spare parts, as well as Robonaut 2 (R2) to the station. Photo credit: NASA/Jack Pfaller

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CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, shuttle Discovery is ushered into the Vehicle Assembly Building (VAB) during a move called "rollover." Once inside the VAB, the shuttle will be joined to its solid rocket boosters and external fuel tank. Later this month, Discovery is scheduled to "rollout" to Launch Pad 39A for its launch to the International Space Station on the STS-133 mission. Targeted to liftoff Nov. 1, Discovery will take the Permanent Multipurpose Module (PMM) packed with supplies and critical spare parts, as well as Robonaut 2 (R2) to the station. Photo credit: NASA/Jack Pfaller

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CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, shuttle Discovery begins to back out of Orbiter Processing Facility-3 during a move called "rollover" to the nearby Vehicle Assembly Building (VAB). Once inside the VAB, the shuttle will be joined to its solid rocket boosters and external fuel tank. Later this month, Discovery is scheduled to "rollout" to Launch Pad 39A for its launch to the International Space Station on the STS-133 mission. Targeted to liftoff Nov. 1, Discovery will take the Permanent Multipurpose Module (PMM) packed with supplies and critical spare parts, as well as Robonaut 2 (R2) to the station. Photo credit: NASA/Dimitri Gerondidakis

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CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, shuttle Discovery pauses for photos during its move called "rollover" from Orbiter Processing Facility-3 to the nearby Vehicle Assembly Building (VAB). Once inside the VAB, the shuttle will be joined to its solid rocket boosters and external fuel tank. Later this month, Discovery is scheduled to "rollout" to Launch Pad 39A for its launch to the International Space Station on the STS-133 mission. Targeted to liftoff Nov. 1, Discovery will take the Permanent Multipurpose Module (PMM) packed with supplies and critical spare parts, as well as Robonaut 2 (R2) to the station. Photo credit: NASA/ Dimitri Gerondidakis

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CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, shuttle Discovery backs out of Orbiter Processing Facility-3 during a move called "rollover" to the nearby Vehicle Assembly Building (VAB). Once inside the VAB, the shuttle will be joined to its solid rocket boosters and external fuel tank. Later this month, Discovery is scheduled to "rollout" to Launch Pad 39A for its launch to the International Space Station on the STS-133 mission. Targeted to liftoff Nov. 1, Discovery will take the Permanent Multipurpose Module (PMM) packed with supplies and critical spare parts, as well as Robonaut 2 (R2) to the station. Photo credit: NASA/Dimitri Gerondidakis

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CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, shuttle Discovery begins to back out of Orbiter Processing Facility-3 during a move called "rollover" to the nearby Vehicle Assembly Building (VAB). Once inside the VAB, the shuttle will be joined to its solid rocket boosters and external fuel tank. Later this month, Discovery is scheduled to "rollout" to Launch Pad 39A for its launch to the International Space Station on the STS-133 mission. Targeted to liftoff Nov. 1, Discovery will take the Permanent Multipurpose Module (PMM) packed with supplies and critical spare parts, as well as Robonaut 2 (R2) to the station. Photo credit: NASA/Jack Pfaller

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CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, shuttle Discovery backs out of Orbiter Processing Facility-3 during a move called "rollover" to the nearby Vehicle Assembly Building (VAB). Once inside the VAB, the shuttle will be joined to its solid rocket boosters and external fuel tank. Later this month, Discovery is scheduled to "rollout" to Launch Pad 39A for its launch to the International Space Station on the STS-133 mission. Targeted to liftoff Nov. 1, Discovery will take the Permanent Multipurpose Module (PMM) packed with supplies and critical spare parts, as well as Robonaut 2 (R2) to the station. Photo credit: NASA/Dimitri Gerondidakis

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CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, shuttle Discovery pauses in between Orbiter Processing Facility-3 and the Vehicle Assembly Building (VAB) during a move called "rollover." Once inside the VAB, the shuttle will be joined to its solid rocket boosters and external fuel tank. Later this month, Discovery is scheduled to "rollout" to Launch Pad 39A for its launch to the International Space Station on the STS-133 mission. Targeted to liftoff Nov. 1, Discovery will take the Permanent Multipurpose Module (PMM) packed with supplies and critical spare parts, as well as Robonaut 2 (R2) to the station. Photo credit: NASA/Jack Pfaller

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CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, shuttle Discovery continues its move, known as "rollover," from Orbiter Processing Facility-3 to the nearby Vehicle Assembly Building (VAB). Once inside the VAB, the shuttle will be joined to its solid rocket boosters and external fuel tank. Later this month, Discovery is scheduled to "rollout" to Launch Pad 39A for its launch to the International Space Station on the STS-133 mission. Targeted to liftoff Nov. 1, Discovery will take the Permanent Multipurpose Module (PMM) packed with supplies and critical spare parts, as well as Robonaut 2 (R2) to the station. Photo credit: NASA/Jack Pfaller

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CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, shuttle Discovery pauses for photos during its move called "rollover" from Orbiter Processing Facility-3 to the nearby Vehicle Assembly Building (VAB). Once inside the VAB, the shuttle will be joined to its solid rocket boosters and external fuel tank. Later this month, Discovery is scheduled to "rollout" to Launch Pad 39A for its launch to the International Space Station on the STS-133 mission. Targeted to liftoff Nov. 1, Discovery will take the Permanent Multipurpose Module (PMM) packed with supplies and critical spare parts, as well as Robonaut 2 (R2) to the station. Photo credit: NASA/ Dimitri Gerondidakis

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KENNEDY SPACE CENTER, FLA. - The orbiter Discovery, sitting on an orbiter transporter, begins making the short trip to NASA's Vehicle Assembly Building (VAB) , seen behind it. The rollover marks the start of the journey to the launch pad and, ultimately, launch. Once inside the VAB, Discovery will be raised to vertical and lifted up and over into high bay 3 for stacking with its redesigned external tank and twin solid rocket boosters. The rollout of Space Shuttle Discovery to Launch Pad 39B is expected in approximately a week. Launch of Discovery on mission STS-121 is scheduled to take place in a window extending July 1 to July 19. Photo credit: NASA/Jack Pfaller

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KENNEDY SPACE CENTER, FLA. - The orbiter Discovery, atop an orbiter transporter, turns toward NASA's Vehicle Assembly Building (VAB). The rollover marks the start of the journey to the launch pad and, ultimately, launch. Once inside the VAB, Discovery will be raised to vertical and lifted up and over into high bay 3 for stacking with its redesigned external tank and twin solid rocket boosters. The rollout of Space Shuttle Discovery to Launch Pad 39B is expected in approximately a week. Launch of Discovery on mission STS-121 is scheduled to take place in a window extending July 1 to July 19. Photo credit: NASA/Jack Pfaller

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CAPE CANAVERAL, Fla. – At NASA’s Kennedy Space Center in Florida, space shuttle Atlantis is towed toward Orbiter Processing Facility-1 OPF-1 after being towed from the Vehicle Assembly Building VAB. At left, space shuttle Discovery is being towed to the VAB after being towed out of OPF-1. The tail cone protects Discovery’s three replica shuttle main engines. The work is part of the Space Shuttle Program’s transition and retirement processing of the three space shuttles. Atlantis is being prepared for display at the Kennedy Space Center Visitor Complex and is scheduled to rollover to the complex in November. Photo credit: NASA/Tim Jacobs

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CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, shuttle Discovery pauses in between Orbiter Processing Facility-3 and the Vehicle Assembly Building (VAB) during a move called "rollover." Once inside the VAB, the shuttle will be joined to its solid rocket boosters and external fuel tank. Later this month, Discovery is scheduled to "rollout" to Launch Pad 39A for its launch to the International Space Station on the STS-133 mission. Targeted to liftoff Nov. 1, Discovery will take the Permanent Multipurpose Module (PMM) packed with supplies and critical spare parts, as well as Robonaut 2 (R2) to the station. Photo credit: NASA/Dimitri Gerondidakis

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CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, shuttle Discovery is ready to continue its move, known as "rollover," from Orbiter Processing Facility-3 to the nearby Vehicle Assembly Building (VAB). Once inside the VAB, the shuttle will be joined to its solid rocket boosters and external fuel tank. Later this month, Discovery is scheduled to "rollout" to Launch Pad 39A for its launch to the International Space Station on the STS-133 mission. Targeted to liftoff Nov. 1, Discovery will take the Permanent Multipurpose Module (PMM) packed with supplies and critical spare parts, as well as Robonaut 2 (R2) to the station. Photo credit: NASA/Jack Pfaller

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KENNEDY SPACE CENTER, FLA. - The orbiter Discovery, atop an orbiter transporter, reaches its destination, the transfer aisle of NASA's Vehicle Assembly Building (VAB). The rollover to the VAB marks the start of the journey to the launch pad and, ultimately, launch. After the slings of the overhead crane are in place, Discovery will be raised to vertical and lifted up and over into high bay 3 for stacking with its redesigned external tank and twin solid rocket boosters. The rollout of Space Shuttle Discovery to Launch Pad 39B is expected in approximately a week. Launch of Discovery on mission STS-121 is scheduled to take place in a window extending July 1 to July 19. Photo credit: NASA/Jack Pfaller

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CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, shuttle Discovery backs out of Orbiter Processing Facility-3 during a move called "rollover" to the nearby Vehicle Assembly Building (VAB). Once inside the VAB, the shuttle will be joined to its solid rocket boosters and external fuel tank. Later this month, Discovery is scheduled to "rollout" to Launch Pad 39A for its launch to the International Space Station on the STS-133 mission. Targeted to liftoff Nov. 1, Discovery will take the Permanent Multipurpose Module (PMM) packed with supplies and critical spare parts, as well as Robonaut 2 (R2) to the station. Photo credit: NASA/Dimitri Gerondidakis

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CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, shuttle Discovery is ushered into the Vehicle Assembly Building (VAB) from Orbiter Processing Facility-3 during a move known as "rollover." Once inside the VAB, the shuttle will be joined to its solid rocket boosters and external fuel tank. Later, Discovery will "roll out" to Launch Pad 39A for its launch to the International Space Station on the STS-133 mission. Targeted to liftoff Nov. 1, Discovery will take the Permanent Multipurpose Module (PMM) packed with supplies and critical spare parts, as well as Robonaut 2 (R2) to the station. Photo credit: NASA/Ben Cooper

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CAPE CANAVERAL, Fla. – At NASA’s Kennedy Space Center in Florida, space shuttle Atlantis is towed toward Orbiter Processing Facility-1 OPF-1 after being towed from the Vehicle Assembly Building VAB. At left, space shuttle Discovery is being towed to the VAB after being towed out of OPF-1. The tail cone protects Discovery’s three replica shuttle main engines. The work is part of the Space Shuttle Program’s transition and retirement processing of the three space shuttles. Atlantis is being prepared for display at the Kennedy Space Center Visitor Complex and is scheduled to rollover to the complex in November. Photo credit: NASA/Tim Jacobs