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KENNEDY SPACE CENTER, FLA. -- The lights from the fixed and rotating service structures bathe Space Shuttle Discovery in a warm glow as it rests on the hardstand of Launch Pad 39B at NASA's Kennedy Space Center after completing the 4.2-mile journey from the Vehicle Assembly Building. First motion was at 12:45 p.m. EDT. The shuttle rests on a mobile launcher platform. The rollout is an important step before launch of Discovery on mission STS-121 to the International Space Station. Discovery's launch is targeted for July 1 in a launch window that extends to July 19. During the 12-day mission, Discovery's crew will test new hardware and techniques to improve shuttle safety, as well as deliver supplies and make repairs to the station. Photo credit: NASA/Dimitri Gerondidakis