Sentry North Exercise
U.S. Air Force Staff Sgt. Alexander Garay, a security forces journeyman assigned to the 156th Security Operations Squadron, Puerto Rico Air National Guard, instructs Airmen with the 156th Contingency Response Group, and the 182nd Airlift Wing, Illinois Air National Guard, 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)