The aerial view of Launch Pad 39B at NASA's Kennedy Space Center shows the Atlantic Ocean at top.

The aerial view of Launch Pad 39B at NASA's Kennedy Space Center shows the Atlantic Ocean at top, the Banana River closer to the pad, and space shuttle Endeavour after its rollout from the Vehicle Assembly Building. At left of the shuttle is the open rotating service structure and the fixed service structure with the 80-foot lightning mast on top. Behind them are the tower that holds 300,000 gallons of water used for sound suppression on the pad during liftoff. First motion of Endeavour out of the VAB was at 11:15 p.m. Sept. 18. Endeavour completed the 4.2-mile journey at 6:59 a.m. EDT. For the first time since July 2001, two shuttles are on the launch pads at the same time at the center. Endeavour will stand by at pad B in the unlikely event that a rescue mission is necessary during space shuttle Atlantis' upcoming mission to repair NASA's Hubble Space Telescope, targeted to launch Oct. 10. After Endeavour is cleared from its duty as a rescue spacecraft, it will be moved to Launch Pad 39A for the STS-126 mission to the International Space Station. That flight is targeted for launch Nov. 12. Photo credit: NASA/Troy Cryder