<b>Pictures:</b> Space Shuttle Discovery on STS-133
In the grasp of the International Space Station’s Canadarm2, the Italian-built Permanent Multipurpose Module (PMM) is transferred from space shuttle Discovery’s payload bay to be permanently attached to the Earth-facing port of the station’s Unity node in this March 1, 2011
Backdropped by the thin line of Earth’s atmosphere and the blackness of space, a docked Russian Soyuz spacecraft (R), a portion of the International Space Station’s Quest airlock and solar array panels are featured in this March 1, 2011
Expedition 26 and STS-133 crew members pose for a photo in the newly-attached Permanent Multipurpose Module (PMM) of the International Space Station while space shuttle Discovery remains docked with the station in this March 1, 2011
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The space shuttle Discovery lifts off February 24, 2011 from
The space shuttle Discovery lifts off February 24, 2011 from
The Coast Guard patrols a lagoon as shuttle Discovery, STS-133 sits on launch pad 39A. (RED HUBER/ORLANDO SENTINEL)
Shuttle launch director Mike Leinbach, center, welcomes astronaut Steve Bowen as the crew of the space shuttle Discovery STS-133 arrives Sunday, February 20, 2011, to the Kennedy Space Center for the launch scheduled for Thursday at 4:50pm. Bowen is replacing astronaut Tim Kopra who was injured in a bicycle accident. (Red Huber/Orlando Sentinel)
Kennedy Space Center director Robert Cabana, second from left, talks with NASA administrator Charlie Bolden, right, with shuttle launch director Mike Leinbach as the crew of the space shuttle Discovery STS-133 arrives Sunday, February 20, 2011, to the Kennedy Space Center for the launch scheduled for Thursday at 4:50pm.
(Red Huber/Orlando Sentinel)Space shuttle Discovery’ STS-133 astronaut Nicole Stott waves Sunday, February 20, 2011, after arriving to the Kennedy Space Center for the launch scheduled for Thursday at 4:50pm. (Red Huber/Orlando Sentinel)
Space shuttle Discovery STS-133 astronauts, left to right, Cmdr. Steve Lindsey, Pilot Eric Boe ,Steve Bowen, Alvin Drew, Michael Barratt and Nicole Stott, arrive Sunday, February 20, 2011, to the Kennedy Space Center for the launch scheduled for Thursday at 4:50 p.m. Mission Specialist Steve Bowen replaced Tim Kopra, who was injured in a bicycle accident. (Red Huber/Orlando Sentinel)
Space shuttle Discovery’ STS-133 astronaut Steve Bowen, left, arrives Sunday, February 20, 2011, in a T38 training jet to the Kennedy Space Center for the launch scheduled for Thursday at 4:50 p.m. Mission Specialist Steve Bowen replaced Tim Kopra, who was injured in a bicycle accident. (Red Huber/Orlando Sentinel)
Space shuttle Discovery’ STS-133 astronaut Steve Bowen, top, in a T-38 training jet as crew members, left to right, Alvin Drew, Pilot Eric Boe Michael Barratt arrive February 20, 2011, to the Kennedy Space Center for the scheduled launch on Thursday at 4:50 p.m. Mission Specialist Steve Bowen replaced Tim Kopra, who was injured in a bicycle accident. (Red Huber/Orlando Sentinel)
NASA administrator Charlie Bolden greets space shuttle Discovery STS-133 mission specialist Alvin Drew, facing camera, as the crew arrives Sunday, February 20, 2011, to the Kennedy Space Center for the launch scheduled for Thursday at 4:50 p.m.
(Red Huber/Orlando Sentinel) A butterfly moves from one wild flower to another as space shuttle Discovery, STS-133, sits on launch pad 39A, in background, at the