U.S. Marines and civilians work to install a MK-154 Launcher Mine Clearance kit onto an assault amphibious vehicle on Camp Pendleton, Calif., June 19, 2017. The MK-154 LMC is being reintroduced to the fleet after safety issues halted its employment in 2013. The system is the only amphibious breaching capability within the Department of Defense, allowing the forces assault mined areas. (U. S. Marine Corps photo by Lance Cpl. Maritza Vela) - U.S. Marines and civilians work to install a MK-154 Launcher Mine Clearance kit onto an assault amphibious vehicle on Camp Pendleton, Calif., June 19, 2017. The MK-154 LMC is being reintroduced to the fleet after safety issues halted its employment in 2013. The system is the only amphibious breaching capability within the Department of Defense, allowing the forces assault mined areas. (U. S. Marine Corps photo by Lance Cpl. Maritza Vela)

An Assault Amphibious Vehicle, with 15th Marine Expeditionary Unit, departs from Red Beach during the Marine Air- Ground Task Force demonstration for the 75th Anniversary on Camp Pendleton, Calif., June 14, 2017. The demonstration allowed civilians to observe Marines as they recertified their qualifications before deployment. (U. S. Marine Corps photo by Lance Cpl. Betzabeth Y. Galvan) - An Assault Amphibious Vehicle, with 15th Marine Expeditionary Unit, departs from Red Beach during the Marine Air- Ground Task Force demonstration for the 75th Anniversary on Camp Pendleton, Calif., June 14, 2017. The demonstration allowed civilians to observe Marines as they recertified their qualifications before deployment. (U. S. Marine Corps photo by Lance Cpl. Betzabeth Y. Galvan)