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KENNEDY SPACE CENTER, FLA. - After successfully completing their driving practice on the M-113 armored personnel carrier behind them, the STS-115 crew poses for a photo. From left are Pilot Christopher Ferguson, Mission Specialists Steven MacLean, Heidemarie Stefanyshyn-Piper, Joseph Tanner and Daniel Burbank, and Commander Brent Jett. 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