Astronaut Nicole Stott works with a European science experiment package in the Space Shuttle Discovery's payload bay.

Space Shuttle Discovery astronaut Nicole Stott (bottom, R) works in Discovery's payload bay during a spacewalk in this image from NASA TV September 1, 2009.


Space Shuttle Discovery astronaut Danny Olivas exits the International Space Station's Qwest airlock at the beginning of his spacewalk in this image from NASA TV September 1, 2009.


credit photo: Reuters pictures.