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Columbia Space Shuttle astronauts (STS-4) Commander Thomas K. Mattingly, foreground, and Pilot Henry W. Hartsfield salute President Ronald Reagan and his wife, Nancy, as the astronauts begin the customary walk-around inspection of the orbiter after landing. Mattingly and Hartsfield were the first to land the Shuttle on a concrete runway. The landing proved that the shuttle could return safely to a precisely targeted location on Earth.
source: http://grin.hq.nasa.gov/ABSTRACTS/GPN-2000-001702.html
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