It has always been conjectured that the suicide of James Forrestal was related to a meeting on the UFO subject that he had with Truman shortly before he bought a gun and became paranoid. This is the theory that I followed in Majestic. Tony Brunt has done a good job of historical reporting on this subject, and published his book on Scribid. Well worth your time: http://www.scribd.com/doc/58545710/Secret-History-And-Why-Barack-Obama-Must-End-It