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Astronauts Finish First Spacewalk to Fix Pump on ISS

Two astronauts from the U.S. space agency have completed the first stage of an effort to repair a faulty pump that shut down part of the International Space Station's critical cooling system several days ago.NASA says astronauts Rick Mastracchio and Mike Hopkins disconnected the faulty ammonia pump while working outside the space station for more than five hours on Saturday.The agency says the two men will try to install a spare pump module during their next spacewalk on Monday, with a...

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