Two U.S. Marine Corps CH-46E Sea Knight helicopters assigned to Marine Medium Helicopter Squadron (HMM) 364 prepare to take off during flight operations aboard the amphibious assault ship USS Peleliu (LHA 5) in the Pacific Ocean June 6, 2012. Peleliu and the 15th Marine Expeditionary Unit were under way participating in an interoperability training exercise. (U.S. Marine Corps photo by Gunnery Sgt. John A. Lee II/Released)