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KENNEDY SPACE CENTER, FLA. - From the west side of Launch Pad 39B, Space Shuttle Discovery is viewed moments after liftoff on mission STS-121. The fiery display fit the day: Fourth of July. The launch made history as it was the first ever to take place on Independence Day. During the 12-day mission, the STS-121 crew of seven will test new equipment and procedures to improve shuttle safety, as well as deliver supplies and make repairs to the International Space Station. Landing is scheduled for July 16 or 17 at Kennedy's Shuttle Landing Facility. Photo credit: NASA/Sandy Joseph, Robert Murray