The back of this photograph is captioned 'Chinook - Rescue hook, Vung Tau,' identifying the corresponding image as a close-up of the cargo/rescue hook assembly on a CH-47 Chinook helicopter. Vung Tau served as a key U.S. Army aviation hub in South Vietnam, and Chinooks based there performed vital troop transport, resupply, and rescue missions throughout the war. Project: 218683