Marines with Combat Engineer Company detonate an oval charge and prepare to enter a building during urban mobility breaching training Dec. 6 at the Central Training Area near Camp Schwab. During the training, the Marines learned to make different charges to breach doors, windows and walls. The Marines also practiced security tactics, movement techniques, protective measures when working with explosives, and what to do in the event of a failed breach. The company is part of Combat Assault Battalion, 3rd Marine Division, III Marine Expeditionary Force.