Two B-52H Stratofortresses taxi down the runway during Prairie Vigilance 16-1 at Minot Air Force Base, N.D., Sept. 16, 2016. The 5th Bomb Wing at Minot Air Force Base, N.D., participated in Prairie Vigilance Sept. 11-16, an annual exercise designed to test the wing’s ability to conduct conventional and nuclear-capable bomber operations. (U.S. Air Force photo/Airman 1st Class J.T. Armstrong)