Airmen assigned to the 28th Civil Engineer Squadron participate in the Prime Base Engineer Emergency Force Challenge at Ellsworth Air Force Base, S.D., Sept. 22, 2022. The Prime BEEF Challenge is a physical and mental readiness challenge that tests every engineer’s capability to operate while under extreme stress. The annual challenge was established to imitate events in deployed environment. (U.S. Air Force photo by Airman Yendi Borjas)