Fitting faces for fighting capabilities
Staff Sgt. Jeffrey Schultze, 9th Reconnaissance Wing Public Affairs photojournalist, performs a series of breathing patterns during a gas mask fit test at the bioenvironmental office at Beale Air Force Base, Calif., March 7, 2018. During the test, Airman must perform a series of breathing and movements to successfully pass. (U.S. Air Force photo by Senior Airman Colville McFee)