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Available for over a year
Greg Milner discusses the early days of GPS, when it was developed as a way to wage a more humane type of warfare. (Photo caption: In this U.S. Air Force handout, a U.S. Air Force F-15E carries the Boeing Small Diameter Bomb (SDB) system. The SDB is an all-weather, day/night 250-lb class guided munition which relies on GPS satellites to provide its accuracy © USAF via Getty Images)
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