Astronaut Tom Marshburn performs his first space walk and the Endeavour crew’s second of the five scheduled for the STS-127 mission. Astronauts Marshburn and Dave Wolf (out of frame) successfully transferred a spare KU-band antenna to long-term storage on the space station, along with a backup coolant system pump module and a spare drive motor for the station's robot arm transporter.
NASA
2009-07-20
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