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A fish-eye lens attached to an electronic still camera was used to capture this image of NASA astronaut Michael Fincke (bottom center) during the mission's fourth session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the seven-hour, 24-minute spacewalk, Fincke and astronaut Greg Chamitoff (out of frame), both STS-134 mission specialists, completed the primary objectives for the spacewalk, including stowing the 50-foot-long boom and adding a power and data grapple fixture to make it the Enhanced International Space Station Boom Assembly, available to extend the reach of the space station's robotic arm. The docked space shuttle Endeavour is visible at bottom left.