DRONES USED FOR FIRST TIME IN MAJOR SEARCH AT GRAND CANYON
Apr 28, 2017
2 minutes
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The desperate effort this week to find two hikers who disappeared at the bottom of the Grand Canyon represented the National Park Service’s most extensive use yet of drones in a search-and-rescue mission.
The Grand Canyon is the only national park with its own fleet of unmanned aircraft for locating people who have gotten lost, stranded,
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