An Airman from the 5th Aircraft Maintenance Squadron oversees maintenance being performed on a B-52H Stratofortress during Exercise Global Thunder 15 on Minot Air Force Base, N.D., Oct. 21, 2014. Global Thunder is U.S. Strategic Command's annual field training and battle staff exercise. It trains Airmen to deter and if necessary, defeat a military attack against the United States. (U.S. Air Force photo/Senior Airman Brittany Y. Bateman)