NASA / SCIENCE PHOTO LIBRARY NASA / SCIENCE PHOTO LIBRARY
Discovery at launch pad, 23 February 2011. Discovery at Launch Pad 39A at the Kennedy Space Center, Florida, USA, after rollout for launch for mission STS-133. The launch took place on 24 February 2011. Discovery was part of NASA's Space Shuttle program. It flew 39 missions over a period of 26 years, being retired from service in March 2011. STS-133 was its final mission, taking place from 24 February to 9 March 2011.
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