FILE – In this March 14, 2015 file photo, a radio-controlled drone appears in flight during an International Drone Day event at an elementary school in Roseburg, Ore. Construction of the nations first unmanned aircraft business park, called Grand Sky, is to begin in May at Grand Forks Air Force Base, N.D. It is one six sites around the country testing unmanned aircraft. The new parks tenants are likely to […]
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