NASA astronauts Andrew Feustel (right) and Greg Chamitoff, both STS-134 mission specialists, participate in a spacewalk as construction and maintenance continue on the International Space Station.
S134-E-009265 (20 May 2011) — NASA astronauts Andrew Feustel (right) and Greg Chamitoff, both STS-134 mission specialists, participate in a spacewalk as construction and maintenance continue on the International Space Station. During the six-hour, 19-minute spacewalk, Feustel and Chamitoff retrieved and installed long-duration materials exposure experiments, installed a light on one of the station’s rail line handcarts, made preparations for adding ammonia to a cooling loop and installed an antenna for the External Wireless Communication system. The newly-installed Alpha Magnetic Spectrometer-2 (AMS) is at center frame. Living onboard the space station at the time were the Expedition 27 crew members. Photo credit: NASA