Douglas R5D Skymaster transports of Naval Air Transport Squadron VR-6 sit on the ramp at Naval Air Station Agana, Guam. These four-engine aircraft, the Navy variant of the Air Force C-54, formed the backbone of NATS long-range logistics flights across the Pacific in the years following World War II, ferrying personnel, mail, and cargo between the U.S. mainland and forward bases. Project: 218206