U.S. Army Sgt. Joel Vargas, 221st Military Police Detachment team leader, peers through his compass during a land navigation exercise at Joint Base Langley-Eustis, Virginia, Oct. 21, 2020. Soldiers learn landnav during basic training and are charged with maintaining proficiency in it throughout their career. (U.S. Air Force photo by Staff Sgt. Joshua Magbanua)