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KENNEDY SPACE CENTER, FLA. - News media representatives arrive in the NASA Newsroom to cover the launch of Space Shuttle Discovery on Return to Flight mission STS-114. The countdown is under way for an anticipated liftoff at 3:51 p.m. EDT July 13. During its 12-day mission, Discovery’s seven-person crew will test new hardware and techniques to improve Shuttle safety, as well as deliver supplies to the International Space Station.