In a field in Halifax, James Peverill and Adam Woodworth have been test-flying a new kind of aircraft. Its flight plan is set by a smartphone or laptop, using a map on the screen. It can fly for 45 minutes, while taking still photos or video of the ground below. The FocalPlane weighs about a pound, and could cost as little as $250. Many expect that the domestic UAV industry is about to take off, and the Federal Aviation Administration has estimated that 30,000 drones could be aloft by 2020
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