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KENNEDY SPACE CENTER, FLA. -- Gathered in the white room on Launch Pad 39A, the space shuttle Atlantis STS-122 crew members listen to an instructor explain space shuttle emergency exit procedures. From left are Mission Specialists Stanley Love, Hans Schlegel, Rex Walheim, Leland Melvin and Leopold Eyharts. Pilot Alan Poindexter and Commander Steve Frick are standing behind them. The STS-122 crew is at NASA's Kennedy Space Center to take part in terminal countdown demonstration test, or TCDT, activities, a standard part of launch preparations. The TCDT provides astronauts and ground crews with equipment familiarization and a simulated launch countdown before launch. On mission STS-122, Atlantis will deliver the European Space Agency's Columbus module to the International Space Station. Columbus is a multifunctional, pressurized laboratory that will be permanently attached to U.S. Node 2, called Harmony, and will expand the research facilities aboard the station. Launch is targeted for Dec. 6. Photo credit: NASA/Kim Shiflett