Col. David Owen, the Marine Expeditionary Force Information Group Commanding Officer, presents a challenge coin to a Marine with 2nd Law Enforcement Battalion Alpha Company during Mountain Warfare Training in Bridgeport, Calif., Aug. 24, 2017. - Col. David Owen, the Marine Expeditionary Force Information Group Commanding Officer, presents a challenge coin to a Marine with 2nd Law Enforcement Battalion Alpha Company during Mountain Warfare Training in Bridgeport, Calif., Aug. 24, 2017. Mountain Warfare Training is a field exercise designed to teach Marines fighting tactics and survival skills in high altitudes and cold weather. The Marines are with 2nd LEB, 3rd LEB, 2nd Intelligence Battalion, 6th Communication Battalion, 2nd Low Altitude Air Defense Battalion, and 2nd Assault Amphibian Battalion. (U.S. Marine Corps Photo by Lance Cpl. Gloria Lepko.)