S134-E-008670 (22 May 2011) --- NASA astronaut Michael Fincke, STS-134 mission specialist, participates in the mission's second session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the eight-hour, seven-minute spacewalk, Fincke and Andrew Feustel (out of frame), mission specialist, completed all planned tasks, including refilling one of the station’s cooling loops with ammonia and lubricating one of the station’s massive solar alpha rotary joints. Photo credit: NASA