Jul 8 2006
From The Space Library
Discovery crew members Michael E. Fossum and Piers J. Sellers performed the first of two scheduled extravehicular activities—spacewalks—for Mission STS-121. During the 7.5-hour spacewalk, the two astronauts performed several tasks to ensure the continued operation of a data, power, and video cable on the station’s exterior. In addition, the two men tested Discovery’s robotic arm and Orbiter Boom Sensor System, components that astronauts could use to repair a damaged orbiter if necessary.
NASA, “STS-121.”
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