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August 1, 2011
Astronaut Piers J. Sellers, STS-112 mission specialist, works on the Starboard One (S1) Truss, newly installed on the International Space Station (ISS). Astronaut David A. Wolf (out of frame), mission specialist, worked in tandem with Sellers during the spacewalk. STS-112s first session of extravehicular activity (EVA) lasted 7 hours and 1 minute.

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