CAPE CANAVERAL, Fla. – On Launch Pad 39A at NASA's Kennedy Space Center in Florida, STS-119 crew members gather in front of the bunker to continue emergency egress training. From left are Mission Specialists Joseph Acaba and Richard Arnold, Pilot Tony Antonelli, and Mission Specialists Koichi Wakata, Steve Swanson (behind Wakata) and John Phillips (at right). 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