A Royal Air Force Mildenhall firefighter uses a bag valve mask to ventilate a simulated unconscious Airman during the fuel extraction exercise at RAF Mildenhall, England, Oct 14. 2021. The 100th Civil Engineer Squadron firefighters arrived at the scene and performed CPR on the Airman as part of the exercise held by the 100th Maintenance Squadron fuels systems shop. (U.S. Air Force photo by Airman Alvaro Villagomez)