WIKIARCHIVES.SPACE

The STS-125 crew gathers around the hatch into space shuttle Atlantis on Launch Pad 39A at NASA's Kennedy Space Center in Florida. From left are Commander Scott Altman, Mission Specialists Michael Good (above), Andrew Feustel, Megan McArthur and Mike Massimino, Pilot Gregory C. Johnson and Mission Specialist John Grunsfeld. The crew is at Kennedy to take part in terminal countdown demonstration test, or TCDT, activities before launching on space shuttle Atlantis’ mission to service NASA’s Hubble Space Telescope. TCDT provides astronauts and ground crews with an opportunity to participate in various simulated countdown activities, including equipment familiarization, emergency training and a simulated launch countdown. Atlantis is targeted to launch Oct. 10.