File photo of a naval officer looking underneath the mockup of an unmanned aircraft in San Diego

 
File photo of a naval officer looking underneath the mockup of an unmanned aircraft in San Diego
A naval officer looks underneath the mockup of a Northrop Grumman X-47B long-range, high endurance unmanned aircraft while visiting the Naval Aviation Centennial event at Naval Air Station North Island in San Diego, California in this February 11, 2011 file photo. Weapons manufacturer Northrop Grumman Corp posted an 80 percent increase in fourth-quarter profit, the company reported February 1, 2012, but said earnings and sales would drop in 2012 given the challenging U.S. defense spending environment. Picture taken February 11, 2011. REUTERS/Mike Blake/File (UNITED STATES - Tags: MILITARY)