JOINT BASE LANGLEY-EUSTIS, Va. – U.S. Air Force Master Sgt. Kyle Nelson, 142d Civil Engineer Squadron Air National Guard firefighter, performs interior safety duties during a rapid intervention team work exercise in the burn building at Joint Base Langley-Eustis, Virginia, Nov. 17, 2022. During a fire, the interior safety officer is a critical position, ensuring the safety of all firefighters by being aware of every door and window to plan escape routes for the team. (U.S. Air Force photo by Airman 1st Class Olivia Bithell)