From a man who knows:

From a post today on John Simkins JFK forum (see links) from legendary retired soldier-of-fortune Gerry Patrick Hemming:

Most of what is in print, including what is at NARA is "Legend" and "backstop" files !! CYA flows through the blood of the Intel Community -- when it clots, we get 9/11s !!

NARA is the National Archives and Records Adminstration.