Saturday, April 12, 2014

space shuttle -- Encyclopedia Britannica

space shuttle -- Encyclopedia Britannica:

"The first vehicle of this type was developed by the U.S. National Aeronautics and Space Administration (NASA). Formally called the Space Transportation System (STS), it lifted off into space for the first time on April 12, 1981 and made 135 flights until the program ended in 2011."

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