NASA - National Aeronautics and Space Administration

ISS026-E-031167 (28 Feb. 2011) --- Attired in his Extravehicular Mobility Unit (EMU) spacesuit, NASA astronaut Alvin Drew, STS-133 mission specialist, is pictured in the International Space Station's Quest airlock as the mission's first spacewalk draws to a close.

ISS026-E-031169 (28 Feb. 2011) --- Attired in his Extravehicular Mobility Unit (EMU) spacesuit, NASA astronaut Alvin Drew, STS-133 mission specialist, is pictured in the International Space Station's Quest airlock as the mission's first spacewalk draws to a close.

ISS026-E-031180 (28 Feb. 2011) --- NASA astronaut Michael Barratt (left), STS-133 mission specialist; and European Space Agency astronaut Paolo Nespoli, Expedition 26 flight engineer, work in the Quest airlock of the International Space Station while space shuttle Discovery remains docked with the station.

ISS026-E-031000 (28 Feb. 2011) --- Attired in his Extravehicular Mobility Unit (EMU) spacesuit, NASA astronaut Alvin Drew, STS-133 mission specialist, enters the International Space Station's Quest airlock as the mission's first spacewalk draws to a close. NASA astronaut Michael Barratt, mission specialist, assisted Drew. Photo credit: NASA or National Aeronautics and Space Administration

S133-E-007462 (28 Feb. 2011) --- NASA astronaut Steve Bowen, STS-133 mission specialist, works with lithium hydroxide (LiOH) canisters from beneath space shuttle Discovery's middeck while docked with the International Space Station. Photo credit: NASA or National Aeronautics and Space Administration

S133-E-007927 (28 Feb. 2011) --- NASA astronaut Michael Barratt, STS-133 mission specialist, is pictured in the Quest airlock of the International Space Station while space shuttle Discovery remains docked with the station. Photo credit: NASA or National Aeronautics and Space Administration

S133-E-007935 (28 Feb. 2011) --- NASA astronaut Steve Lindsey, STS-133 commander, works on the aft flight deck of space shuttle Discovery while docked with the International Space Station. Photo credit: NASA or National Aeronautics and Space Administration

S133-E-007942 (28 Feb. 2011) --- NASA astronauts Eric Boe (left), STS-133 pilot; and Steve Bowen, mission specialist, work with lithium hydroxide (LiOH) canisters from beneath space shuttle Discovery's middeck while docked with the International Space Station. Photo credit: NASA or National Aeronautics and Space Administration

S133-E-007943 (28 Feb. 2011) --- NASA astronaut Michael Barratt, STS-133 mission specialist, uses a still camera on the middeck of space shuttle Discovery while docked with the International Space Station. Photo credit: NASA or National Aeronautics and Space Administration

S133-E-007242 (28 Feb. 2011) --- NASA astronaut Michael Barratt, STS-133 mission specialist, reads a procedure checklist in the Unity node of the International Space Station while space shuttle Discovery remains docked with the station. Photo credit: NASA or National Aeronautics and Space Administration