A U.S. Marine Corps military working dog, assigned to Marine Special Operations Command (MARSOC), prepares to conduct fast-rope training with Marine Medium Tiltrotor Squadron (VMM) 263, near Marine Corps Air Station New River, N.C., June 23, 2015. VMM-263 provided the aerial support platform, enabling MARSOC Marines to complete their scheduled training. (U.S. Marine Corps photo by Lance Cpl. Jodson B. Graves/Released)