U.S. Air Force Tech. Sgt. Chase Pavlic, 307th Civil Engineer Squadron water fuels system maintenance craftsman, briefs his fellow students at Tyndall Air Force Base, Florida, Feb. 11, 2020. The briefing was part of the capstone event for Silver Flag, an exercise designed to hone forward operating skills of Air Force civil engineers. (U.S. Air Force photo by Master Sgt. Ted Daigle)