170407-N-RC734-216 PACIFIC OCEAN (April 7, 2017) Marines assigned to the 15th Marine Expeditionary Unit (15th MEU), fast-rope from a UH-1Y Huey helicopter assigned to Marine Medium Tiltrotor Squadron (VMM) 161 aboard the amphibious transport dock ship USS San Diego (LPD 22)during a visit, board, search and seizure exercise. (U.S. Navy photo by Mass Communication Specialist 1st Class Joseph M. Buliavac/Released)