Sentry North Exercise
U.S. Air Force Senior Airman Rashel Andujar, logistics plans specialist, 156th Contingency Response Group, Puerto Rico Air National Guard, reloads her weapon while in a shoot, move, communicate & close quarters battle training during exercise Sentry North at Alpena Combat Readiness Training Center, Michigan, June 6, 2025. Sentry North 2025 focused on operating in a contested environment with adversary aircraft, electronic jamming, and simulated surface-to-air threats, providing a premier joint training opportunity to ensure participating units are combat-ready and interoperable in operationally limited environments. (U.S. Air National Guard photo by Master Sgt. Rafael D. Rosa)