Senior Airman Cameron Guy (left), 12th Aircraft Maintenance Unit RQ-4 crew chief, and Tech. Sgt. Shareem Jones, 12th Aircraft Maintenance Unit flightline expediter, perform an engine inspection for a RQ-4 Global Hawk prior to launch Sept. 17, 2013, at Beale Air Force Base, Calif. The Northrop Grumman Corp. announced the aircraft achieved 100,000 flight hours Sept. 5. (U.S. Air Force photo by Airman 1st Class Bobby Cummings/Released)