U.S. Air Force Col. Mindy Davitch, center, 316th Wing Misson Support Group commander, and Maj. Katrina Cheesman, left, 316th Wing Public Affairs Chief, discuss Joint Base Andrews’ involvement during a per- and polyfluoroalkyl (PFAS) substance community forum held at the Surratts-Clinton Branch Library in Clinton, Md., April 29, 2025. Andrews has already transitioned to a fluorine-free firefighting foam and removed PFAS-based materials from its emergency response vehicles.