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KENNEDY SPACE CENTER, FLA. -- At the NASA television studio, the STS-118 crew members participate in a news conference. Seated from left are Commander Scott Kelly, Pilot Charlie Hobaugh and Mission Specialists Tracy Caldwell, Rick Mastracchio, Dave Williams, Barbara R. Morgan and Alvin Drew. The crew has just returned from a 13-day mission to the International Space Station. On the mission, the crew installed a new gyroscope, an external spare parts platform and another truss segment to the expanding station. STS-118 was the 119th space shuttle flight, the 22nd flight to the station, the 20th flight for Endeavour and the second of four missions planned for 2007. Photo credit: NASA/George Shelton