U.S. Air Force Staff Sgt. Travis Coursey, left, 100th Maintenance Squadron fuels system craftsman, performs CPR on an Airman simulating unconsciousness while Senior Airman Ashdon Rogers, right, 100th MXS fuels system journeyman, watches during a fuel cell extraction exercise at Royal Air Force Mildenhall, England, Oct. 14, 2021. The exercise tested the ability of fuels system shop Airmen to respond to an Airman losing consciousness inside of a fuel cell while performing maintenance. (U.S. Air Force photo by Airman Alvaro Villagomez)