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CAPE CANAVERAL, Fla. - After taking part in a simulated launch countdown aboard space shuttle Atlantis, STS-125 Mission Specialist Mike Massimino joins other crew members at the slidewire basket area on the fixed service structure at Launch Pad 39A at NASA's Kennedy Space Center in Florida. The baskets are used for emergency escape from the shuttle. The countdown is the culmination of terminal countdown demonstration test, or TCDT, activities as preparation before launch. TCDT provides astronauts and ground crews with an opportunity to participate in various launch activities, including equipment familiarization, emergency training and the countdown. Atlantis’ STS-125 mission to service NASA’s Hubble Space Telescope is targeted for launch Oct. 14. Photo credit: NASA/Kim Shiflett