Molding Explosives Marine Corps Lance Cpl. Nathan Long, left, not shown, compresses a C-4 explosive block in preparation for a breaching and demolition training exercise at Camp Pendleton, Calif., Sept. 19, 2017. Long is a combat engineer assigned to Bravo Company, 7th Engineer Support Battalion, 1st Marine Logistics Group. Marine Corps photo by Lance Cpl. Roderick Jacquote SHARE: Download: Full Size (1.75 MB) Tags: marines, northcom, northern command, training, marine corps Credit: Lance Cpl. Roderick Jacquote VIRIN: 170919-M-RX597-023A.JPG Photo Gallery