U.S. Marines with 1st Explosive Ordnance Disposal Company,

U.S. Marines with 1st Explosive Ordnance Disposal Company, 7th Engineer Support Battalion, 1st Marine Logistics Group, partner with Orange County Sheriff’s Department Hazardous Devices Section to set explosive charges during the Post-Blast Analysis Course at Camp Pendleton, Calif., April 11, 2018. During this portion of the Post-Blast Analysis Course, the Marines and sheriffs were tasked with the preparation of various sized charges of composition C-4 and trinitrotoluene (TNT) to be placed in the ground before detonation. (U.S. Marine Corps Photo by Lance Cpl. Quentarius Johnson)