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CAPE CANAVERAL, Fla. - Space shuttle Endeavour is hard down on Launch Pad 39B. The shuttle and mobile launcher platform it sits on rest atop the crawler-transporter that carried them from the Vehicle Assembly Building. First motion out of the VAB was at 11:15 p.m. Sept. 18. At left of the shuttle is the open rotating service structure with the payload changeout room revealed. Endeavour completed the 4.2-mile journey to Launch Pad 39B on Sept. 19 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/Dimitri Gerondidakis