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KENNEDY SPACE CENTER, FLA. -- Seated in a slidewire basket at the 195-foot level of the Fixed Service Structure, Launch Pad 39A, are (left to right) STS-101 Mission Specialists Mary Ellen Weber and Jeffrey N. Williams, who is reaching for the release lever. The release of the basket will send it shooting down the 1,200-foot slidewire to a bunker west of the launch pad. The crew is practicing emergency egress from the orbiter as part of Terminal Countdown Demonstration (TCDT) activities that include a simulated launch countdown and familiarization with the payload. During their mission to the International Space Station, the STS-101 crew will be delivering logistics and supplies, plus preparing the Station for the arrival of the Zvezda Service Module, expected to be launched by Russia in July 2000. Also, the crew will conduct one space walk to perform maintenance on the Space Station. This will be the third assembly flight to the Space Station. STS-101 is scheduled to launch April 24 at 4:15 p.m. from Launch Pad 39A