Senior Airman Claudia Rodgers, 512th Logistics Readiness Squadron, measures the face of Senior Airman Stephen Fields, 512th Maintenance Squadron, as part of the 512th Airlift Wing’s Ability to Survive and Operate Training event Sept. 9, 2017 at Dover Air Force Base, Del. The measurement was taken to ensure Fields received the correct size M-50 Gas Mask. (U.S. Air Force photo by Staff Sgt. Joe Yanik)