Tech. Sgt. Ross Perry, the 7th Aircraft Maintenance Squadron NCO in charge of electronic warfare , left, and Airman 1st Class Terrance Boykins, a 7th AMXS crew chief, work on a B-1B Lancer on April 9, 2016, at Dyess Air Force Base, Texas. Perry and Boykins participated in exercise Constant Vigilance 16, which tests the Air Force Global Strike Command’s ability to respond quickly and effectively in a real-world situation. (U.S. Air Force photo/Senior Airman Shannon Hall)