Fitting faces for fighting capabilities
U.S. Air Force 2nd Lt. Marina Cumming, 9th Operations Support Squadron intelligence officer, puts on a gas mask during a fit test at Beale Air Force Base, Calif., March 7, 2018. The fit test is a required of all members prior to deployment, if they change in body weight or have facial surgery. (U.S. Air Force photo by Senior Airman Colville McFee)