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KENNEDY SPACE CENTER, FLA. -- This side view taken from the upper level of the fixed service structure shows Space Shuttle Discovery, mated with the orange external tank, as it has come to rest on the hardstand of Launch Pad 39B. The shuttle rests on a mobile launcher platform and made the 4.2-mile journey from the Vehicle Assembly Building via the crawler-transporter beneath the 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