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On the Fixed Service Structure on Launch Pad 39B, the STS-102 crew are instructed on the use of slidewire baskets for emergency exits from the launch pad. Listening to the instructor are (on the left side, left to right) Mission Specialist James Voss, Pilot James Kelly, Mission Specialists Yury Usachev and Susan Helms, Commander James Wetherbee; on the right side are Mission Specialists Paul Richards and Andrew Thomas. The crew is taking part in Terminal Countdown Demonstration Test activities, which include a simulated launch countdown. STS-102 is the eighth construction flight to the International Space Station, with Space Shuttle Discovery carrying the Multi-Purpose Logistics Module Leonardo. Voss, Helms and Usachev are the Expedition Two crew who will be the second resident crew on the International Space Station. They will replace Expedition One, who will return to Earth with Discovery. Launch on mission STS-102 is scheduled for March 8.