U.S. Marines with the 15th Marine Expeditionary Unit’s

U.S. Marines with the 15th Marine Expeditionary Unit’s Maritime Raid Force fast-rope out of a CH-53E Super Stallion onto the flight deck of the USS Essex (LHD 2) at sea in the Indian Ocean, June 17, 2015. Fast-roping from a helicopter onto a moving vessel is an essential skill for the MRF during visit, board, search, and seizure missions. (U.S. Marine Corps photo by Cpl. Anna Albrecht/Released)