This undated photo released Thursday, May 30, 2013 by aerospace technology company Northrop Grumman shows the RQ-4 Block 20 Global Hawk unmanned aircraft that students in the University of North ... more 
This undated photo released Thursday, May 30, 2013 by aerospace technology company Northrop Grumman shows the RQ-4 Block 20 Global Hawk unmanned aircraft that students in the University of North Dakota aviation program will learn to fly. (AP Photo/Courtesy of Northrup Grumman) less 
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Associated Press | Photo By AP Photo/Courtesy of Northrup Grumman
Tue, Apr 22, 2014 9:00 AM EDT