U.S. Airmen with the 156th Contingency Response Group, Puerto Rico Air National Guard, and the 182nd Airlift Wing, Illinois Air National Guard, conduct ramp operations after a C-130 Hercules aircraft lands on an airfield during Sentry North Exercise at Alpena Combat Readiness Training Center, Michigan, June 1, 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