FORT POLK, La. – Assaultmen with 1st Battalion, 23rd Marine Regiment, prepare C4 explosives during a demolition range here, June 3. Marines took part in numerous live-fire ranges, which culminated in a platoon-sized attack as a part of the unit’s annual training. The battalion’s assualtmen were responsible for breaching mock enemy obstacles and clearing the way for follow-on forces. (Photo by Cpl. John M. McCall)