Tactical Training Marines fire an MK 153 shoulder-launched multipurpose assault weapon during a mobile assault course as a part of Unit Deployment Program 19.1 at the Marine Corps Air Ground Combat Center, Twentynine Palms, Calif., Aug 9, 2018. Marine Corps photo by Lance Cpl. William Chockey SHARE: Download: Full Size (3.43 MB) Credit: Lance Cpl. William Chockey VIRIN: 180809-M-UB217-282C.JPG Photo Gallery