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Space shuttle Discovery lands on Runway 33 at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida at 9:08 a.m. (EDT) on April 20, 2010, completing the 15-day STS-131 mission to the International Space Station. Main gear touchdown was at 9:08:35 a.m. followed by nose gear touchdown at 9:08:47 a.m. and wheels stop at 9:09:33 a.m. Aboard are NASA astronauts Alan Poindexter, commander; James P. Dutton Jr., pilot; Dorothy Metcalf-Lindenburger, Rick Mastracchio, Stephanie Wilson, Clayton Anderson and Japanese astronaut Naoko Yamazaki, all mission specialists. The seven-member STS-131 crew carried the Leonardo Multi-Purpose Logistics Module, filled with supplies, a new crew sleeping quarters and science racks that were transferred to the station's laboratories. The crew also switched out a gyroscope on the station's truss, installed a spare ammonia storage tank and retrieved a Japanese experiment from the station's exterior. STS-131 is the 33rd shuttle mission to the station and the 131st shuttle mission overall.