Marines board an MV-22 Osprey aircraft before conducting fast-rope training aboard the amphibious assault ship USS Wasp in the Atlantic Ocean, July 5, 2016. The Marines are assigned to Maritime Raid Force, 22nd Marine Expeditionary Unit, which is supporting U.S. national security interests in Europe as it operates in the U.S. 6th Fleet area of operations. Marine Corps photo by Lance Cpl. Koby I. Saunders