940th Fire Emergency Services Flight reservists make an initial entry into a live fire training structure, Hill Air Force Base, Utah. The KC-10 Extender mockup uses a controlled propane fire to simulate aircraft emergencies. Live fire is used so firefighters experience the intensity and heat of real fire. (U.S. Air Force photo by TSgt. Kenneth McCann/Released)

Flames engulf a KC-10 Extender mockup during a live fire exercise, Hill Air Force Base, Utah. The aircraft training structure is equipped with propane gas tanks that produce flames to simulate a real world incident. 940th Fire Emergency Services Flight reservists from Beale Air Force Base, California practiced fighting aircraft fires. (U.S. Air Force photo by Tech Sgt. Kenneth McCann/Released)

Senior Airman Stanley Zamora, 940th Fire Emergency Services Flight reservist, drives the Striker crash vehicle at the live fire exercise. During the training he sprayed the water from the Striker to assist the ground fire team's entry into the aircraft. (U.S. Air Force photo by Tech Sgt. Kenneth McCann/Released)

940th Fire Emergency Services Flight reservists use a Striker Vehicle to spray water during a live fire training exercise. The exercise prepares firefighters to fight aircraft fires. The 940th FESF trained at Hill Air Force Base, Utah to prepare for future stateside or overseas emergencies. (U.S. Air Force photo by Tech Sgt. Kenneth McCann/Released)

Staff Sgt. Roderick Tan, 940th Fire Emergency Services Flight reservist, drains water from the Striker crash vehicle's large diameter hose. The vehicle is used by Air Force firefighters to battle flightline fire emergencies. (U.S. Air Force photo by Tech. Sgt. Kenneth McCann/Released)

Senior Airman Stanley Zamora, 940th Wing Fire Emergency Services Flight reservist, performs hydraulic ventilation inside a training tower to remove simulated heat and smoke from the room. The room is ventilated to make it easier to find victims and makes the atmosphere more survivable. (U.S. Air Force photo by Tech Sgt. Kenneth McCann/Released)

Fire Captain Dustin Maruquin of Hill Air Force Base, Utah, instructs 940th Fire Emergency Services Flight reservists inside a flashover fire training unit. A flash over is created when combustible material inside a building reaches a certain temperature and ignites. (U.S. Air Force Photo by Tech Sgt. Kenneth McCann/Released)