U.S. Air Force Airmen, assigned to the 916th Air Refueling Wing, manage aircraft records on the flight line during Ability to Survive and Operate (ATSO) training at Seymour Johnson Air Force Base, N.C., March 9, 2019. ATSO exercises ensure Airmen can perform their workplace duties in chemically hazardous environments. (U.S. Air Force photo by Jeramy Moore)