KENNEDY SPACE CENTER, FLA. -- In the Rotation, Processing and Surge Facility, or RSPF, workers begin to remove the cover on a solid rocket booster segment for propellant grain inspection required as part of safety analysis. The booster segment will be stacked with others to be used on Space Shuttle Atlantis on mission STS-122 targeted for December. The mission will continue assembly of the International Space Station, delivering and installing the Columbus Laboratory. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, FLA. -- The payload for mission STS-118 is being installed in the payload bay on Space Shuttle Endeavour from the payload changeout room on Launch Pad 39A. The payload includes the S5 truss, SPACEHAB module and external stowage platform 3. The mission is the 22nd flight to the International Space Station and is targeted for launch on Aug.7. Photo credit: NASA/Amanda Diller

KENNEDY SPACE CENTER, FLA. -- On Launch Pad 39A, workers help transfer the payload for mission STS-118 from the payload changeout room into the payload bay on Space Shuttle Endeavour. Seen here is the SPACEHAB module. The payload also includes the S5 truss and external stowage platform 3. The mission is the 22nd flight to the International Space Station and is targeted for launch on Aug.7. Photo credit: NASA/Amanda Diller

KENNEDY SPACE CENTER, FLA. -- On Launch Pad 39A, workers in the payload changeout room use the payload ground-handling mechanism to transfer the mission STS-118 payload into the payload bay on Space Shuttle Endeavour. The payload includes the S5 truss, the SPACEHAB module and the external stowage platform 3. The mission is the 22nd flight to the International Space Station and is targeted for launch on Aug.7. Photo credit: NASA/Amanda Diller

KENNEDY SPACE CENTER, FLA. -- On Launch Pad 39A, a worker helps transfer the payload for mission STS-118 from the payload changeout room into the payload bay on Space Shuttle Endeavour. Seen here is the orbiter docking system. The payload also includes the S5 truss, the SPACEHAB module and external stowage platform 3. The mission is the 22nd flight to the International Space Station and is targeted for launch on Aug.7. Photo credit: NASA/Amanda Diller

KENNEDY SPACE CENTER, FLA. -- The payload for mission STS-118 is being installed in the payload bay on Space Shuttle Endeavour on Launch Pad 39A. Seen here, from top, are the orbiter docking system, the SPACEHAB tunnel adapter and the SPACEHAB module. The payload also includes the S5 truss and the external stowage platform 3. The mission is the 22nd flight to the International Space Station and is targeted for launch on Aug.7. Photo credit: NASA/Amanda Diller

KENNEDY SPACE CENTER, FLA. -- On Launch Pad 39A, workers in the payload changeout room monitor the payload ground-handling mechanism as it transfers the mission STS-118 payload into the payload bay on Space Shuttle Endeavour. The payload includes the S5 truss, the SPACEHAB module and the external stowage platform 3. The mission is the 22nd flight to the International Space Station and is targeted for launch on Aug.7. Photo credit: NASA/Amanda Diller

KENNEDY SPACE CENTER, FLA. -- The payload for mission STS-118 is being installed in the payload bay on Space Shuttle Endeavour on Launch Pad 39A. Seen at center is the SPACEHAB module. At left and right in the photo are the shuttle robotic arm and the orbiter boom sensor system. The payload also includes the S5 truss and external stowage platform 3. The mission is the 22nd flight to the International Space Station and is targeted for launch on Aug.7. Photo credit: NASA/Amanda Diller