A firefighter assigned to the 633rd Civil Engineer Squadron connects a hose to a fire hydrant during a structure fire that is part of a squadron-wide Phase Two exercise at Joint Base Langley-Eustis, Virginia, Nov. 18, 2020. Although the fire was real, it was in a controlled environment to strengthen readiness and assess the fire department’s use of personnel, equipment and fire apparatuses. (U.S. Air Force photo by Senior Airman Alexandra Singer)