Marines with 1st Combat Engineer Battalion, 1st Marine Division, I Marine Expeditionary Force, deploy an assault vehicle launched bridge during Exercise Pioneer Express aboard Camp Roberts, Calif., Sept. 1, 2015. The exercise will ensure that the Marines and Sailors of the battalion will remain effective through complex training evolutions and detailed evaluations. (U.S. Marine Corps photo by Lance Cpl. Caitlin Bevel) - Marines with 1st Combat Engineer Battalion, 1st Marine Division, I Marine Expeditionary Force, deploy an assault vehicle launched bridge during Exercise Pioneer Express aboard Camp Roberts, Calif., Sept. 1, 2015. The exercise will ensure that the Marines and Sailors of the battalion will remain effective through complex training evolutions and detailed evaluations. (U.S. Marine Corps photo by Lance Cpl. Caitlin Bevel)