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CAPE CANAVERAL, Fla. - At NASA's Kennedy Space Center in Florida, STS-126 Mission Specialist Steve Bowen (right) is next to take his turn driving the M-113 armored personnel carrier. At left is astronaut rescue team leader Capt. George Hoggard. The mission crew is at Kennedy for pre-launch preparation known as Terminal Countdown Demonstration Test, or TCDT. The training provides astronauts and ground crews with an opportunity to participate in various simulated countdown activities, including equipment familiarization and a simulated launch countdown. On the STS-126 mission, space shuttle…