Mattlyn McClain, an Army Junior Reserve Training Officer Corps cadet, dons a gas mask during a Junior ROTC Expo May 3, 2019, at Little Rock Air Force Base, Arkansas. Cadets from Air Force, Army, and Navy Junior ROTC programs across Arkansas, Tennessee and Mississippi toured Little Rock AFB and its amenities to experience the active-duty lifestyle. (U.S. Air Force photo by Staff Sgt. Mercedes Taylor)