U.S. Army Sgt. Joel Vargas, 221st Military Police Detachment team leader, checks his compass during a land navigation exercise at Joint Base Langley-Eustis, Virginia, Oct. 21, 2020. Landnav is one of the Army’s basic warrior tasks, and plays a critical role in mission success and troop safety. (U.S. Air Force photo by Staff Sgt. Joshua Magbanua)