Firefighters with the 137th Special Operations Wing Fire and Emergency Services, Oklahoma City, and the 138th Fighter Wing Fire Department, Tulsa, Oklahoma, cool a metal aircraft structure before entering to attack an interior fire during deployment readiness training at March Air Reserve Base in Riverside County, California, June 28, 2018. The 137th Special Operations Civil Engineering Squadron members train at a regional training site every three years as a part of this deployment readiness training. (U.S. Air National Guard photo by Staff Sgt. Brigette Waltermire)