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June 4, 2014
(16 Aug. 2010) --- NASA astronauts Tracy Caldwell Dyson and Doug Wheelock (partially out of frame at bottom), both Expedition 24 flight engineers, prepare to enter the Quest airlock of the International Space Station as the session of extravehicular activity (EVA) draws to a close. During the seven-hour, 20-minute spacewalk, Caldwell Dyson and Wheelock installed a spare pump module on the S1 truss, along with additional tasks.

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