U.S. Air Force Staff Sgt. Duron Washington, right, and Senior Airman Ki’Andrei White, both 633rd Civil Engineer Squadron pavement and construction equipment craftsmen, participate during a Prime Base Engineer Emergency Force land navigation training at Joint Base Langley-Eustis, Va., June 15, 2017. The training enabled the CES Airmen to boost their confidence when navigating through unknown territories without technological devices. (U.S. Air Force photo/Airman 1st Class Kaylee Dubois)