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KENNEDY SPACE CENTER, Fla. -- STS-91 flight crew members receive instruction on slidewire basket operations during emergency egress training on the 195-foot level of Launch Complex 39A. From left to right, they are Mission Specialists Wendy B. Lawrence and Janet Kavandi, Ph.D.; Pilot Dominic Gorie; and Mission Specialists Franklin Chang-Diaz, Ph.D., and Valery Ryumin, with the Russian Space Agency. The STS-91 flight crew also includes Mission Commander Charles Precourt (not shown). The training is part of Terminal Countdown Demonstration Test (TCDT) activities held at KSC prior to each Space Shuttle flight to provide crews with an opportunity to participate in simulated countdown scenarios. STS-91 is scheduled to be launched on June 2 with a launch window opening around 6:10 p.m. EDT. The mission will feature the ninth Shuttle docking with the Russian Space Station Mir, the first Mir docking for Discovery, the conclusion of Phase I of the joint U.S.-Russian International Space Station Program, and the first flight of the new Space Shuttle super lightweight external tank. Andrew Thomas, Ph.D., will be returning to Earth with the crew after living more than four months aboard Mir