Airman Stephanie Mata-Castellon, 341st Missile Security Operations Squadron missile security operator, opens a capsule to check for explosives during an exercise at a launch facility, March 19, 2021 near Malmstrom Air Force Base, Mont. Missile security operators are on alert day and night to safeguard the most powerful weapon system in the world: the Minuteman III intercontinental ballistic missile. (U.S. Air Force photo by Airman Elijah Van Zandt)