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KENNEDY SPACE CENTER, FLA. - STS-115 Commander Brent Jett takes his turn at the wheel, driving the M-113 armored personnel carrier. Also on the ride are (left to right) Capt. George Hoggard, who is astronaut rescue team leader, and Mission Specialists Joseph Tanner, Steven MacLean and Daniel Burbank. The STS-115 crew are at NASA's Kennedy Space Center for Terminal Countdown Demonstration Test activities such as the M-113 training. They will also practice emergency egress from the launch pad and take part in a simulated launch countdown. Liftoff of mission STS-115 aboard Space Shuttle Atlantis is scheduled in a window beginning Aug. 27. Photo credit: NASA/Cory Huston