gt. First Class Christopher Rosenberger, a member of the Wisconsin National Guard’s 54th Civil Support Team, tests an unknown substance during a collective lanes training exercise in Madison, Wis., on March 8, 2022. The Madison-based CST is the state’s full-time response team for emergencies or terrorist events that involve weapons of mass destruction, toxic industrial chemicals or natural disasters. Wisconsin National Guard photo by Staff Sgt. Katie Theusch