U.S. Air Force Airmen, assigned to the South Carolina Air National Guard’s 169th Fighter Wing, participate in an exercise that measures the ability to survive and operate in chemical warfare equipment at McEntire Joint National Guard Base, S.C., March 3, 2018. Swamp Fox Airmen continue to hone routine skills to meet combatant command requirements. The muscle memory that is formed by using this equipment multiple times allows Airmen the ability to focus their attention on completing the mission under austere conditions. (U.S. Air National Guard photo by Senior Airman Megan Floyd)