The crew members gather on the fixed service structure to listen to the trainer about emergency egress procedures.

The STS-119 crew members gather on the fixed service structure on Launch Pad 39A at NASA's Kennedy Space Center in Florida to listen to the trainer about emergency egress procedures. Left of center is Mission Specialist John Phillips; on the right are Mission Specialists Richard Arnold, Steve Swanson and Joseph Acaba and Commander Lee Archambault. The astronauts are at Kennedy to prepare for launch as part of the Terminal Countdown Demonstration Test activities. The TCDT includes equipment familiarization and a simulated launch countdown. The crew of space shuttle Discovery is targeted to launch on the STS-119 mission Feb. 12. During Discovery's 14-day mission, the crew will install the S6 truss segment and solar arrays to the starboard side of the International Space Station, completing the station's truss, or backbone. Photo credit: NASA/Kim Shiflett