U.S. Air Force Senior Airman Cody Smitherman, 633rd Civil Engineer Squadron electrical systems apprentice, crawls with his weapon during Prime Base Engineer Emergency Force training at Joint Base Langley-Eustis, Virginia, Nov. 15, 2018. Members assigned to the 633rd CES took part in various readiness exercises, including low crawls, a simulated firing range and a Humvee rollover scenario. (U.S. Air Force photo by Airman 1st Class Monica Roybal)