U.S. Air Force Staff Sgt. Robert Gallagher, 7th Aircraft Maintenance Squadron B-1B Lancer crew chief, prepares to marshal a B-1 during Exercise Constant Vigilance 16, April 10, 2016, at Dyess Air Force Base, Texas. Participants of this exercise verified Air Force Global Strike Command’s ability to respond quickly and effectively to real-world situations. (U.S. Air Force photo by Airman 1st Class Katherine Miller/Released)