Dominic Gorie and Gregory H. Johnson sit in the slidewire basket part of emergency egress training.

Following the simulated launch countdown, STS-123 Commander Dominic Gorie (left) and Pilot Gregory H. Johnson sit in the slidewire basket, part of emergency egress training. The countdown was the culmination of the terminal countdown demonstration test, or TCDT. The TCDT provides astronauts and ground crews with an opportunity to participate in various countdown activities, including equipment familiarization and emergency egress training. Endeavour is targeted to launch at 2:28 a.m. EDT March 11 on the 16-day STS-123 mission to the International Space Station. Endeavour and its crew will deliver the first section of the Japan Aerospace Exploration Agency's Kibo laboratory and the Canadian Space Agency's two-armed robotic system, Dextre. Photo credit: NASA/Kim Shiflett