The Wing Headquarters building at Nakhon Phanom Royal Thai Air Force Base (NKP) flew the American and Thai flags together, symbolizing the joint basing agreement that allowed U.S. forces to conduct air operations over Laos and the Ho Chi Minh Trail. NKP was home to A-1 Skyraider units, forward air controllers, and search-and-rescue crews throughout the Vietnam War. Project: 219104