U.S. Marines with 3rd Platoon, Bravo Company, 2D Combat Engineer Battalion, 2D Marine Division detonate a wall breeching explosive aboard Fort Pickett, Va., Sept 18, 2011. The Marines used detonation cord along with C-4 explosives to conduct various breeching methods. More than 900 Marines and Sailors will take part in the Deployment for Training exercise at Fort Pickett, Sept. 6-23. The battalion is scheduled to attach to the 24th Marine Expeditionary Unit a few days after the training. (Photo by U.S. Marine Corps Pfc. Cesar N. Contreras)(Released)