Benjamin Trapnell, an associate professor of aviation at the University of North Dakota, with a remote-controlled vehicle known as a hexocopter.
Credit: Dan Koeck for The New York Times
On the pilot's computer screen, planted at ground level a few yards from the airport runway here, the data streaming across the display tracked an airplane at 1,300 feet above a small city on the coast, making perfect circles at 150 miles per hour.
From The New York Times
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