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Space station pump fixed after two spacewalks

During a spacewalk, NASA astronaut Rick Mastracchio helps to identify the problem with a faulty coolant pump on the International Space Station.

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After two spacewalks, astronauts on the International Space Station have repaired a degraded pump that removes excess heat from the earth-orbiting spacecraft. The fix let the crew restore power to labs, experiments and other electrical components on the space station.

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