In this April 2, 2014 photo, Grand Forks County Sheriff Bob Rost is seen in his office in Grand Forks, N.D. Rost says the department flew its first nighttime unmanned aircraft mission early Sunday morning, Sept. 28, 2014, when four suspects fled after a traffic stop. The Federal Aviation Administration in March granted the department permission to fly a drone at night. (AP Photo/Dave Kolpack)
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