After I saw Oliver Stone’s movie JFK in 1991, I began reading books on the JFK assassination. As the years went on, I gradually became persuaded that the assassination was actually a highly sophisticated regime-change operation on the part of the U.S. national-security establishment, i.e., the Pentagon and the CIA. But I never felt that the evidence was sufficient to persuade me beyond a reasonable doubt, which is the standard of proof in a criminal case. Then I read Douglas Horne’s five-volume book Inside the Assassination Records Review Board. By the time I finished reading that book, I knew beyond...