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KENNEDY SPACE CENTER, FLA. -- During emergency egress training as part of the pre-launch terminal countdown demonstration test, or TCDT, STS-120 crew members learn how to get out of the slidewire basket at the landing site. In the basket are Mission Specialists Doug Wheelock and Stephanie Wilson. The TCDT provides astronauts and ground crews an opportunity to participate in various simulated countdown activities, including equipment familiarization and emergency training. The STS-120 mission will deliver the U.S. Node 2 module, named Harmony, aboard space shuttle Discovery to the International Space Station. Launch of Discovery on mission STS-120 is targeted for Oct. 23 at 11:38 a.m. EDT on a 14-day mission. Photo credit: NASA/Kim Shiflett