U.S. Air Force Airman 1st Class Jacob Brown, 633rd Civil Engineer Squadron water fuels apprentice, practices individual movement techniques during Prime Base Engineer Emergency Force training at Joint Base Langley-Eustis, Virginia, July 19, 2018. Ninety Airmen attended the training, which focused on land navigation and individual movement techniques. (U.S. Air Force photo by Staff Sgt. Areca T. Bell)