Astronauts in Internatioanl Space Station

Catherine Coleman (L) and Nicole Stott work outside the new Permanent Multipurpose Module (PMM) of the International Space Station in this photo provided by NASA and taken March 4, 2011. [Photo/Agencies]

Inside the newly installed Permanent Multipurpose Module (PMM) on the International Space Station are the six Discovery crew members of the STS-133 mission in this photo provided by NASA and taken March 4, 2011. [Photo/Agencies]

NASA astronaut Catherine Coleman, Expedition 26 flight engineer, is pictured near the Robonaut2 container in the newly-installed Permanent Multipurpose Module (PMM) of the International Space Station in this photo provided by NASA and taken March 2, 2011. [Photo/Agencies]