Space shuttle Discovery lifts off on its final scheduled NASA mission from Launch Pad 39A at 4:53 p.m. Thursday, Feb. 24, 2011. The U.S. Air Force’s 45th Space Wing provided flawless Eastern Range support for the mission, which features one of the last Air Force shuttle crews. STS-133 is commanded by Steve Lindsey, a retired Air Force colonel. Active Air Force Colonels Eric Boe and Alvin Drew are Pilot and Mission Specialist-1, respectively. (NASA photo/NASA TV)
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