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ISS020-E-021858 (18 July 2009) --- Astronauts Dave Wolf (right) and Tim Kopra are suited and just about ready to exit the International Space Station's Quest airlock to begin the first of five scheduled spacewalks over the next several days. When Wolf and six other astronauts return to Earth in the Space Shuttle Endeavour, Kopra will stay behind to serve a tour of duty on the orbital outpost.
