STS-108 Pilot Mark E. Kelly (left) takes a seat in the slidewire basket while Commander Dominic L. Gorie climbs in at the front. The basket is part of the emergency egress system from the 195-foot level of the Fixed Service Structure on Launch Pad 39B. The training is part of Terminal Countdown Demonstration Test activities that also include a simulated launch countdown.. Launch of Space Shuttle Endeavour on mission STS-108 is scheduled for Nov. 29 at 7:44 p.m. EST