A mystery that began with the 1987 publication of an alleged briefing document from ex-US President Harry Truman to president-elect Dwight Eisenhower in November 1953. The document dealt with government knowledge about UFOs, aliens, and above Top Secret projects. It listed its twelve members as Dr Lloyd Berkner, Dr Detlev Bronk, Dr Vanndevar Bush, James Forrestal, Gordon Gray, Vice Admiral Roscoe Hillenkoetter, Dr Jerome Hunsaker, Dr Donald Menzel, General Robert Montague, Rear Admiral Sidney Souers, General Nathan Twining and General Hoyt Vandenberg.