U.S. Air Force Staff Sgt. Isaac Sunnock, 633rd Civil Engineer Squadron lead firefighter and Airman 1st Class Jacob Vuckovich, 633rd CES firefighter, participate in a live-fire training exercise at Joint Base Langley-Eustis, Virginia, Sept. 19, 2018. The exercise tested the firefighter’s ability to communicate and work together to respond to mishaps in a timely manner. (U.S. Air Force photo by Staff Sgt. Areca T. Bell)