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A Days Work
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A Day's Work

April 13, 2010
During the second spacewalk of the STS-131 mission, NASA astronauts Rick Mastracchio and Clayton Anderson (out of frame) unhooked and removed the depleted ammonia tank and installed a 1,700-pound replacement on the station's Starboard 1 truss. This was the second of three spacewalks in the coolant tank replacement process.


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