NASA - National Aeronautics and Space Administration

S133-E-008815 (5 March 2011) --- NASA astronauts Nicole Stott, Alvin Drew (center) and Steve Bowen, all STS-133 mission specialists, pose while placing the STS-133 patch in the Quest airlock of the International Space Station, which was added to the growing collection of insignias representing crews who performed spacewalks from Quest. Photo credit: NASA or National Aeronautics and Space Administration

S133-E-008817 (5 March 2011) --- NASA astronaut Alvin Drew, STS-133 mission specialist, signs the STS-133 patch, which was added to the growing collection of insignias representing crews who performed spacewalks from the Quest airlock of the International Space Station. Photo credit: NASA or National Aeronautics and Space Administration

S133-E-008818 (5 March 2011) --- NASA astronaut Steve Bowen, STS-133 mission specialist, signs the STS-133 patch, which was added to the growing collection of insignias representing crews who performed spacewalks from the Quest airlock of the International Space Station. NASA astronaut Nicole Stott, mission specialist, looks on. Photo credit: NASA or National Aeronautics and Space Administration

S133-E-008819 (5 March 2011) --- NASA astronaut Nicole Stott, STS-133 mission specialist, signs the STS-133 patch, which was added to the growing collection of insignias representing crews who performed spacewalks from the Quest airlock of the International Space Station. Photo credit: NASA or National Aeronautics and Space Administration

S133-E-008821 (5 March 2011) --- NASA astronaut Eric Boe, STS-133 pilot, signs the STS-133 patch, which was added to the growing collection of insignias representing crews who performed spacewalks from the Quest airlock of the International Space Station. Photo credit: NASA or National Aeronautics and Space Administration

S133-E-008822 (5 March 2011) --- NASA astronaut Michael Barratt, STS-133 mission specialist, signs the STS-133 patch, which was added to the growing collection of insignias representing crews who performed spacewalks from the Quest airlock of the International Space Station. Photo credit: NASA or National Aeronautics and Space Administration

S133-E-008824 (5 March 2011) --- NASA astronaut Steve Lindsey, STS-133 commander, signs the STS-133 patch, which was added to the growing collection of insignias representing crews who performed spacewalks from the Quest airlock of the International Space Station. Photo credit: NASA or National Aeronautics and Space Administration

S133-E-008828 (5 March 2011) --- NASA astronauts Alvin Drew (left), Michael Barratt and Nicole Stott, all STS-133 mission specialists, are pictured 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

S133-E-008778 (5 March 2011) --- NASA astronaut Steve Bowen, STS-133 mission specialist, works in the Permanent Multipurpose Module (PMM) 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-008803 (5 March 2011) --- NASA astronaut Eric Boe, STS-133 pilot, works in the Permanent Multipurpose Module (PMM) of the International Space Station while space shuttle Discovery remains docked with the station. Photo credit: NASA or National Aeronautics and Space Administration