From the fixed service structure on Launch Pad 39A at NASA's Kennedy Space Center.

From the fixed service structure on Launch Pad 39A at NASA's Kennedy Space Center, the STS-124 crew looks out over the slidewire basket landing area. The crew is learning about and practicing emergency egress procedures. Seen in front from left are Mission Specialists Akihiko Hoshide and Mike Fossum and Commander Mark Kelly; at right, Mission Specialist Karen Nyberg and Pilot Ken Ham, Not seen are Mission Specialists Ron Garan and Greg Chamitoff. Hoshide represents the Japan Aerospace Exploration Agency. The crew is at Kennedy 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