117 crew members receive instruction on emergency egress using the slidewire basket system during Terminal Countdown Demonstration Test activities.

In the Launch Pad 39A area, Mission STS-117 crew members receive instruction on emergency egress using the slidewire basket system during Terminal Countdown Demonstration Test activities. Here, Mission Specialists Steven Swanson (left) and Danny Olivas (right) practice exiting from the slidewire basket. The TCDT also includes M-113 armored personnel carrier training, and a simulated launch countdown. The mission payload aboard Space Shuttle Atlantis is the S3/S4 integrated truss structure, along with a third set of solar arrays and batteries. The crew of six astronauts will install the truss to continue assembly of the International Space Station. Photo credit: NASA/Kim Shiflett