U.S. Air Force Airman 1st Class Zachariah Christenson, Firefighter Combat Challenge safety monitor, stabilizes a ladder climb obstacle during the challenge at Joint Base Langley-Eustis, Va., Oct. 13, 2017. Safety monitors oversaw each station to ensure equipment was secure and maneuvers were properly performed. (U.S. Air Force photo by Tech. Sgt. Natasha Stannard)