Stock Photo - Astronaut Steven Swanson, STS-117 mission specialist, participates in the mission's fourth and final session of extravehicular activity (EVA), as construction continues on the International Space Station. Among other tasks, Swanson and astronaut Patrick Forrester (out of frame), mission specialist, continued activation of the station's new starboard 3 and 4 (S3S4) truss segment; checked out the Drive Lock Assembly 2, one of two mechanisms that will drive rotation of the S3S4 Truss Solar Alpha Rotary Joint (SARJ); and removed the final launch restraints on the SARJ.

Stock Photo: Astronaut Steven Swanson, STS-117 mission specialist, participates in the mission's fourth and final session of extravehicular activity (EVA).

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