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CAPE CANAVERAL, Fla. – Just before dawn, space shuttle Endeavour is bathed in xenon lights after being secured on Launch Pad 39B at NASA's Kennedy Space Center in Florida. First motion on rollout from the Vehicle Assembly Building was at 11:57 p.m. EDT April 16. On either side of the pad are two of the new lightning towers erected for NASA's Constellation Program, which will use the pad for Ares rocket launches. 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 NASA's 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 June 13. Photo credit: NASA/Dimitri Gerondidakis