Convention showcases unmanned capabilities 
                Maj. Gen. Blair E. Hansen addresses an audience of unmanned systems developers and industry professionals during the Association for Unmanned Vehicle Systems International Unmanned Systems North America 2009 Convention Aug. 11 at the Washington, D.C., Convention Center. General Hansen is the Air Force deputy chief of staff for intelligence, surveillance and reconnaissance. (Defense Department photo/Army Sgt. 1st Class Michael J. Carden)
                
                    
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