NOV 26, 2019 U.S. Marines with 2nd Battalion, 4th Marine Regiment, 1st Marine Division, detonate obstacle-breaching Bangalore torpedoes during a live-fire and maneuver exercise at the company assault course, Range 400, Marine Corps Air Ground Combat Center, Twentynine Palms, Calif., Nov. 20, 2019. 1st Marine Division took advantage of training opportunities at the Combat Center to further develop their proficiency while fully integrating combined arms systems of an infantry battalion. U.S. Marine Corps photo by Lance Cpl. Colton Brownlee