U.S. Marines assigned to Marine Heavy Helicopter Squadron (HMH) 464, conduct a pre-flight brief before departing from Marine Corps Air Station New River, N.C., March 12, 2015. HMH-464 conducted Air Delivered Ground Refueling training in support of 2d Tank Battalion, 2d Marine Division to increase unit proficiency and expand interoperability. (U.S. Marine Corps Photo by Lance Cpl. Anthony J. Brosilow/Released)