Interesting. I have always felt that there was more to this crash than met the media's jaundiced eye. First, JFK was no inexperienced pilot. He had over 1000 hours in the cockpit. Therefore, I can't believe he would make such an amatuerish mistake. In addition, you have to believe that a Kennedy's airplane would have every conceivable navigation aid available. After all, he bought this plane (I believe) which virtually no one does. He must have had GPS which would have told him his exact position at any given moment, how far he was from the runway, etc. Finally, the way they were buried at sea and the words of JFK invoked that "We are born in the sea and return to the sea" just seemed like such BS to end an investigation and dispose of the bodies. But I guess I am just a paranoid conspiracy buff. After all the authorities said JFK was just disoriented because he was not used to flying at night. I am sure they know best.
I recommend that all JFK crash theorists read the NTSB report, available at: http://www.ntsb.gov/NTSB/brief.asp?ev_id=20001212X19354&key=1
JFK had 310 total hours, not 1000. Any airplane ever built will find its way into a spiral dive if not under human or autopilot control. Once the spiral starts it will almost always build up speed. Just the unfamiliar sound of increasing wind noise is enough to alarm a pilot, even one with several hundred hours, if he has not experienced it before and has no visual reference to "straight and level" which was highly possible in this case according to reports from other pilots flying in the area.
In the past 50 years of availability of high performance airplanes to people with the means to buy them, there have been hundreds of similar fatal accidents, namy of them at night; the pilot doesn't come back to tell what his thoughts or reactions were. Often the airplane breaks up in the air due to overstress loads when the design speed is exceeded, and the press reports a "midair explosion". I lost a friend this way. His Beech Bonanza was scattered over about a mile. The last thing he told me was that he was going to have the flight instruments overhauled so he could begin working on his instrument rating.