U.S. Air Force Staff Sgt. Isaac Sunnock, 633rd Civil Engineer Squadron lead firefighter, participates in a live-fire training exercise at Joint Base Langley-Eustis, Virginia, Sept. 19, 2018. The firefighters train almost 20 hours a week to remain proficient in their skills. (U.S. Air Force photo by Staff Sgt. Areca T. Bell)