Members of the 341st Missile Security Operations Squadron convoy response force escort a wounded defender on a folding litter during a Tactical Combat Casualty Care simulation training exercise as part of Operation Frozen Hell, Jan. 12, 2021, at Malmstrom Air Force Base, Mont. Defenders provide security from the moment an incident occurs until the last of the wounded are safely evacuated. (U.S. Air Force photo by Airman Elijah Van Zandt)