EDWARDS AIR FORCE BASE, CA - MAY 20: A NASA Global Hawk Unmanned Aircraft System is seen on May 20, 2014 on Edwards Air Force Base, California. NASA provided a behind-the-scenes tour of the NASA ... more 
EDWARDS AIR FORCE BASE, CA - MAY 20: A NASA Global Hawk Unmanned Aircraft System is seen on May 20, 2014 on Edwards Air Force Base, California. NASA provided a behind-the-scenes tour of the NASA Armstrong Flight Research Center's hangar in Palmdale, California, and the center's main campus at Edwards Air Force Base to news media representatives. (Photo by David McNew/Getty Images) less 
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Getty Images | Photo By David McNew / Getty Images
Wed, May 21, 2014 8:02 AM EDT