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KENNEDY SPACE CENTER, FLA. -- STS-123 Mission Specialist Rick Linnehan addresses the news media on hand for his arrival at NASA Kennedy Space Center's Shuttle Landing Facility. The crew for space shuttle Endeavour's STS-123 mission is at Kennedy for a full launch dress rehearsal, known as the terminal countdown demonstration test or TCDT. Endeavour's seven astronauts arrived at Kennedy's Shuttle Landing Facility in their T-38 training aircraft between 10:45 and 10:58 a.m. EST. The terminal countdown demonstration test provides astronauts and ground crews with an opportunity to participate in various simulated countdown activities, including equipment familiarization and emergency training. Endeavour is targeted to launch March 11 at 2:28 a.m. EDT on a 16-day mission to the International Space Station. On the mission, Endeavour and its crew will deliver the first section of the Japan Aerospace Exploration Agency's Kibo laboratory and the Canadian Space Agency's two-armed robotic system, Dextre. Photo credit: NASA/Kim Shiflett