https://www.youtube.com/watch?v=W2gTmUpvOBg
Marines with 1st Combat Engineer Battalion, 1st Marine Division, conduct a simulated amphibious breach in support of Steel Knight-18 at San Clemente Island, California, Dec. 6, 2017. Steel Knight-18 is a 1st Marine Division led exercise which enables Marines and Sailors to operate in a realistic environment to develop necessary skill sets to maintain a fully capable Marine Air Ground Task Force. (U.S. Marine Corps video by LCpl. Preston Hightower)
