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Astronauts to Embark on Spacewalk

Astronauts from the U.S. space agency have begun the first of a series of three spacewalks to repair a faulty cooling pump on the International Space Station. Two astronauts stepped out of the ISS Saturday, just after 12 UTC. NASA says the two will spend nearly seven hours working outside the orbiting spacecraft where they will disconnect the faulty ammonia pump.A second spacewalk is scheduled for Monday before they finish their work on Wednesday. The malfunctioning pump shut down the...

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