Donald Menzel is director of the Harvard College Observatory. Menzel was involved the National Security Agency and held a Top Secret Ultra security clearance. It is said that Donald Menzel was a member of the MJ-12 as an astronomical consultant. Menzel is the author of the following books: Flying Saucers (1953), The UFO Enigma: The Definitive Explanation Of The UFO Phenomenon (1977) and The World Of Flying Saucers: A Scientific Examination Of A Major Myth Of The Space Age (1963)