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CAPE CANAVERAL, Fla. - Under the watchful eyes of astronaut rescue team leader Capt. George Hoggard, at left, STS-126 Mission Specialist Sandra Magnus takes her turn driving the M-113 armored personnel carrier at NASA's Kennedy Space Center in Florida. Behind Hoggard is Mission Specialist Shane Kimbrough. Magnus and the other crew members are 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 familiari…