DENVER, CO--AUGUST 24TH 2010--Bill Green, marketing manager for PMI Industries from Cleveland Ohio, peeks inside of Northrup Grumman's model of a X-47B, Navy Unmanned Combat Air System Demonstration at the AUVSI's Unmanned Systems North America 2010 show

DENVER, CO--AUGUST 24TH 2010--Bill Green, marketing manager for PMI Industries from Cleveland Ohio, peeks inside of Northrup Grumman's model of a X-47B, Navy Unmanned Combat Air System Demonstration at the AUVSI's Unmanned Systems North America 2010 show Tuesday August 24th 2010 at the Colorado Convention Center. The aircraft is designed to be "autonomous, low-observable representative unmanned aircraft to perform the first-ever carrier launches and recoveries, and autonomous refueling." Andy Cross, The Denver Post (Photo By Andy Cross/The Denver Post via Getty Images)