U.S. Marines with the 15th Marine Expeditionary Unit's Maritime Raid Force drop rope before a fast-rope mission from a UH-1Y Venom during maritime interoperability training aboard Naval Amphibious Base Coronado, Calif., Jan. 9, 2015. MIT prepares the MRF for their upcoming deployment by enhancing their combat skills and teaching them techniques for boarding vessels. (U.S. Marine Corps photo by 1st Lt. Allison Burgos/Released)