关于这张图
ISS020-E-024004 (24 July 2009) --- This is a close-up view of astronaut Tom Marshburn using a power tool during his second spacewalk on July 24. Out of frame is astronaut Christopher Cassidy with whom he'll team again on July 27 for the STS-127 crew's fifth and final session of extravehicular activity. Eleven astronauts and cosmonauts remained inside the International Space Station and the shuttle to which it was docked, while the two suited astronauts continued work on the orbital outpost.
