President John F. Kennedy, First Lady Jaqueline Kennedy and Texas Gov. John Connally ride in a limousine moments before Kennedy was assassinated in Dallas on Nov. 22, 1963. (Walt Cisco/Dallas Morning News/Handout/File Photo via REUTERS)
Bill Sullivan was too controversial to die quietly. As the number three man in the FBI during the turbulent mid-20th century, he collected the nation's secrets, and when he retired to Sugar Hill, New Hampshire, they came with him.