Astronaut performing a spacewalk. NASA astronaut, Daniel C. Burbank, participating in the second of three extra-vehicular activities (EVAs, or spacewalks) during the STS-115 mission. During the EVA, astronauts continued assembly and maintenance of the ISS. The STS-115 mission launched on 9th September 2006 and returned to Earth on 21st September 2006. Photographed on 13th September 2006.
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