Tech. Sgt. Megan O’Regan, left, with the 157th Medical Group, Detachment 1, briefs fellow medics on medical supplies in preparation for a New England CERFP mass casualty exercise, Nov. 5. 2019, Brunswick, Maine. The exercise simulated the collapse of a chemical manufacturing building. (U.S. Air National Guard photo by Tech. Sgt. Aaron Vezeau)