U.S. Air Force maintainers assigned to the 916th Maintainence Group, perform contamination prevention procedures on a pilot before aircraft entry during Ability to Survive and Operate (ATSO) training at Seymour Johnson Air Force Base, N.C., March 9, 2019. ATSO exercises like this one ensure Airmen can perform their workplace duties in chemically hazardous environments. (U.S. Air Force photo by Jeramy Moore)