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August 1, 2011
Astronauts Piers J. Sellers (left) and David A. Wolf, STS-112 mission specialists, work on the newly installed Starboard One (S1) Truss during the third and final scheduled session of extravehicular activity (EVA) for the STS-112 mission. The spacewalk lasted 6 hours and 36 minutes. A thin slice of sunlight can be seen at Earth's horizon.

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