Expedition 16 Commander Peggy Whitson (upper left) and Flight Engineer Dan Tani work outside the International Space Station during the Nov. 20 spacewalk. Credit: NASA TV

Spacewalkers Peggy Whitson and Dan Tani move a fluid tray outside the International Space Station during Saturday's spacewalk. Image credit: NASA TV

The International Space Station is viewed from space shuttle Discovery after undocking during the STS-120 mission. Image credit: NASA

Picture taken shortly after the begin of the ISS SARJ inspection spacewalk on December, 18th 2007.
Image Credit: NASA TV