KENNEDY SPACE CENTER, FLA. - The STS-115 crew members talk about their upcoming driving practice on the M-113 armored personnel carrier with Capt. George Hoggard (back to camera), who is astronaut rescue team leader. The astronauts seen, left to right, are Mission Specialists Heidemarie Stefanyshyn-Piper, Dan Burbank, Steven MacLean and Joe Tanner, and Pilot Christopher Ferguson. Not visible is Commander Brent Jett. MacLean represents the Canadian Space Agency. 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