Astronaut Exit into Space - Astronaut extravehicular activity - Astronaut Clayton Anderson's Exit into Space....

Astronaut Exit into Space - Astronaut extravehicular activity - Astronaut Clayton Anderson's Exit into Space. Maintenance of the International Space Station (ISS). 9 April 2010. NASA astronaut Clayton Anderson, STS - 131 mission specialist, participates in the mission's first session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six - hour, 27 - minute spacewalk, Anderson and Rick Mastracchio (out of frame), mission specialist, helped move a new 1,700 - pound ammonia tank from space shuttle Discovery's cargo bay to a temporary parking place on the station, retrieved an experiment from the Japanese Kibo Laboratory exposed facility and replaced a Rate Gyro Assembly on one of the truss segments. April 9 2010