U.S Marines with the 15th Marine Expeditionary Unit's Maritime Raid Force prepare to board the ATLS-9701 during maritime interoperability training in the San Diego Bay, Calif., Jan. 11, 2015. MIT prepares the 15th MEU's 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)