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KENNEDY SPACE CENTER, FLA. -- The STS-102 crew enjoys a snack before beginning suitup procedures for launch of Space Shuttle Discovery on the eighth construction flight to the International Space Station. From left, seated are Mission Specialists Paul Richards and Andrew Thomas, Pilot James Kelly and Commander James Wetherbee; Mission Specialists Yury Usachev, representing the Russian Aviation and Space Agency, Susan Helms and James Voss. Usachev, Helms and Voss are wearing different shirts because they also are the Expedition Two crew who will be replacing Expedition One on the International Space Station. Discovery is scheduled to launch March 8 at 6:42 a.m. EST, carrying the Multi-Purpose Logistics Module Leonardo. The primary delivery system used to resupply and return Station cargo requiring a pressurized environment, Leonardo will deliver up to 10 tons of laboratory racks filled with equipment, experiments and supplies for outfitting the newly installed U.S. Laboratory Destiny.