180425-M-ZD670-0004 CAMP PENDLETON, Calif. (April 25, 2018) The hazardous materials team at Marine Corps Base Camp Pendleton, Calif. ensures the area around them isn’t hazardous during the Semper Durus exercise at Marine Corps Air Station, Camp Pendleton, April 25, 2018. Semper Durus exercises regional command and control during crisis situations to improve response procedures and limit impact while responding to possible terrorist. (U.S. Marine Corps photo by Lance Cpl. Betzabeth Y. Galvan/Released)