Defense Exercise Marine Corps 1st Lt. Taylor Barefoot programs a counter-unmanned aircraft system on a Marine defense vehicle during a training exercise at Marine Corps Air Ground Combat Center Twentynine Palms, Calif., Nov. 13, 2018. SHARE: Download: Full Size (2.62 MB) Tags: Marines Credit: Marine Corps Lance Cpl. Dalton S. Swanbeck VIRIN: 181113-M-EC058-0125C.JPG Photo Gallery