Tech. Sgt. William Bannister, 439th Civil Engineer Squadron firefighter based out of Westover Air Reserve Base, Mass., checks on a wood fire before starting a burn building training event Aug. 24, 2021, at Malmstrom Air Force Base, Mont. The fire department holds 39 mutual-aid agreements with off-base fire departments to assist in wildland fires within their vicinity. (U.S. Air Force photo by Staff Sgt. Tristan Truesdell)