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KENNEDY SPACE CENTER, FLA. -- At NASA Kennedy Space Center's Launch Pad 39A, the crew for space shuttle Endeavour's STS-123 mission traverses the exit route from the White Room during instruction on emergency egress from the pad. From back to front are Mission Specialist Mike Foreman, Commander Dominic Gorie, Pilot Gregory H. Johnson and Mission Specialists Takao Doi of the Japan Aerospace Exploration Agency and Garrett Reisman. The crew is at Kennedy for a full launch dress rehearsal, known as the terminal countdown demonstration test or TCDT. 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