Students and instructors with the Expeditionary Warfare School, Quantico, Va., pose for a picture on a locomotive on Marine Corps Logistics Base Barstow’s rail yard, April 11. Supply and logistics students from the EWS came to tour MCLB Barstow as a part of the military occupation specialty specific training prior to their spring field exercise at Marine Air Ground Combat Center Twentynine Palms. - Students and instructors with the Expeditionary Warfare School, Quantico, Va., pose for a picture on a locomotive on Marine Corps Logistics Base Barstow’s rail yard, April 11. Supply and logistics students from the EWS came to tour MCLB Barstow as a part of the military occupation specialty specific training prior to their spring field exercise at Marine Air Ground Combat Center Twentynine Palms.