U.S. Marines with the 15th Marine Expeditionary Unit's Maritime Raid Force climb a caving ladder board and seize the training vessel Diane G during Composite Training Unit Exercise (COMPTUEX) off the coast of San Diego March 26, 2015. The MRF Marines continue to improve proficiencies with VBSS exercises along with their Navy counterparts before their deployment. (U.S. Marine Corps photo by 1st Lt. Allison Burgos/Released)