Senior Airman Kerry Bowden, 28th Aircraft Maintenance Squadron aerospace propulsion technician, examines the propulsion system of a B-1 bomber for leaks and cracks during a safety inspection at Ellsworth Air Force Base, S.D., March 28, 2013. Ellsworth B-1 bombers provide the U.S. with ground and air superiority, an advantage that would not be possible without Airmen who work around-the-clock to service and repair B-1s at a moment's notice. (U.S. Air Force photo by Airman 1st Class Zachary Hada/Released)