Marines with 1st Battalion, 8th Marine Regiment prepare to fire during a company live-fire exercise at Marine Corps Base Camp Lejeune, N.C., Sept. 30, 2015. The exercise is in preparation for the integrated training exercise taking place at Air-Ground Combat Center Twentynine Palms, Calif., in October. - Marines with 1st Battalion, 8th Marine Regiment prepare to fire during a company live-fire exercise at Marine Corps Base Camp Lejeune, N.C., Sept. 30, 2015. The exercise is in preparation for the integrated training exercise taking place at Air-Ground Combat Center Twentynine Palms, Calif., in October.