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CAPE CANAVERAL, Fla. -- Under the supervision of Battalion Chief George Hoggard, STS-124 Mission Specialist Karen Nyberg takes her turn (right) driving the armored personnel carrier, part of emergency training. At left are Mission Specialists Ron Garan and Akihiko Hoshide, who represents the Japan Aerospace Exploration Agency. They and other crew members are at NASA's Kennedy Space Center for a dress launch rehearsal called the terminal countdown demonstration test. TCDT provides astronauts and ground crews with an opportunity to participate in various simulated countdown activities, including equipment familiarization and emergency training. On the STS-124 mission, the crew will deliver and install the Japanese Experiment Module – Pressurized Module and Japanese Remote Manipulator System. Discovery's launch is targeted for May 31. Photo credit: NASA/Kim Shiflett