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| ROGER RESSMEYER / CORBIS |
The Columbia lands after its first mission in 1981
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 Jan. 5, 1972
President Richard Nixon orders the development of a reusable space shuttle that can take off like a rocket, orbit the Earth and land like an airplane. As approved, the program calls for a vehicle that is smaller and less expensive than initially envisioned
April 12, 1981
The first shuttle, Columbia, is launched into space. The flight lasts slightly more than two days; its purpose is primarily to test the spacecraft's systems
June 18, 1983
Sally Ride, traveling on Challenger, becomes the first American woman in space. The crew deploys two communications satellites |
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