U.S. Army National Guard Staff Sgt. Maryann Marr, reconnaissance noncommissioned officer with the 33rd Weapons of Mass Destruction Civil Support Team, gives a pre-exercise brief for a full-scale chemical, biological, radiological, nuclear and explosive exercise at Joint Base Andrews, Md., May 21, 2025. The exercise focused on identifying and mitigating an unknown CBRNE hazard. (U.S. Air Force photo by Airman 1st Class Patrick Njuguna)