Send us Fan Mail Season 4 Episode 33. Host Michael Ryan interviews retired NASA scientist Dr. Richard F. Haines about cases he researched for his unpublished book on UFOs witnessed during the Vietnam War. His book covers the time period from June 1966 to October 1973. Cases include a soldier who is taken aboard a craft near his fire base at Chu Chee. There is also the incredible incident at Nha Trang Air Base when a 50 foot wide UFO hovered 300 feet above the base and ...