171204-M-OB268-0017 CAMP PENDLETON, Calif. (Dec. 4, 2017) A U.S. Marine Corps M1 assault breacher vehicle assigned to 1st Combat Engineer Battalion, 1st Marine Division, maneuvers across a beach before a simulated amphibious breach in support of exercise Steel Knight 18 at Marine Corps Base Camp Pendleton, Calif. Steel Knight is a 1st Marine Division led exercise enabling Marines and Sailors to operate in a realistic environment developing necessary skill sets to maintain a fully capable Marine Air Ground Task Force. (U.S. Marine Corps photo by Lance Cpl. Rhita Daniel/Released)