Space Shuttle Endeavour (Orbiter Vehicle Designation: OV-105) is one of the retired orbiters of the Space Shuttle program of NASA, the space agency of the United States.[1] Endeavour was the fifth and final spaceworthy NASA space shuttle to be built, constructed as a replacement for Challenger. Endeavour first flew in May 1992 on mission STS-49 and its last mission STS-134 was in May 2011.[2][3] The STS-134 mission was originally planned as the final mission of the Space Shuttle program,[4] but with authorization of the STS-135 mission, Atlantis became the last Space Shuttle to fly.

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