Tech. Sgt. Marcus Ayala, 319th Comptroller Squadron quality assurance manager, takes attendance of airmen participating in an off-base exercise May 20, 2019, on Grand Forks Air Force Base, North Dakota. The 4-day Summer Viking 19-01 exercise took place at a nearby Air National Guard Base in Fargo, N.D., and placed participants in a simulated contested environment to practice increased readiness. (U.S. Air Force photo by Senior Airman Elora J. Martinez)