JOINT BASE LANGLEY-EUSTIS, Va. – Ray Flora, Hampton Division of Fire and Rescue medic firefighter, enters a building with a “Class A” fire during a rapid intervention team work exercise in the burn building at Joint Base Langley-Eustis, Virginia, Nov. 17, 2022. “Class A” fires indicate the source of the combustion to be from organic origins and contain carbon, in this case wood acted as the source of the combustion. (U.S. Air Force photo by Airman 1st Class Olivia Bithell)