U.S. Airmen with the 156th Contingency Response Group, Puerto Rico Air National Guard, conduct a short notice evacuation from a primary work facility to a secondary area (“bug out”) during exercise Sentry North at Alpena Combat Readiness Training Center, Michigan, June 2, 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 ensuring participating units are combat-ready and interoperable in operationally limited environments. (U.S. Air National Guard video by 1st Lt. Eliezer Soto) More