As seen through a night-vision device, A U.S. Army Special Operations soldier talks on a radio with his leadership team before conducting a close quarter battle training during Exercise Emerald Warrior at Camp Shelby, Mississippi, March 5, 2018. Emerald Warrior is the largest joint and combined special operations exercise, U.S. Special Operations Command forces train to respond to various threats across the spectrum of conflict. Air Force photo by Airman 1st Class Kristen Heller