FILE - In this May 14, 2013 file photo, one of several small drones designed for use by law enforcement and first responders is shown at University of North Dakota in Grand Forks, N.D. The Federal Aviation Administration says North Dakota's unmanned aircraft system test site is ready for operations. FAA Administrator Michael Huerta signed the certificate during a visit to the state Monday, April 21, 2014. North Dakota's test site is part of a new aerospace and business complex at the Grand Forks Air Force Base. The FAA says the main goal of the state's initial operations is to show that drones can check soil quality and the status of crops in some areas. (AP Photo/Minnesota Public Radio, Dan Gunderson, File)
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