U.S. Marines with 1st Combat Engineer Battalion, use C-4 explosives during a breach at Marine Corps Air-Ground Combat Center Twentynine Palms, Calif., May 18, 2017. Marines train using a variety of breaching equipment and assault vehicles to improve combat readiness, tactical and technical proficiency to ensure mission success. (U.S. Marine Corps photo by Pfc. Roxanna Gonzalez)

Courtesy of DVIDS