Who Killed President John F. Kennedy?

Even the basic facts of [John F.] Kennedy's death are still subject to heated argument. The historical consensus seems to have settled on Lee Harvey Oswald as the lone assassin, but conspiracy speculation abounds--involving [Lyndon B.] Johnson, the C.I.A., the mob, Fidel Castro or a baroque combination of all of them. Many of the theories have been circulating for decades and have now found new life on the Internet, in Web sites febrile with unfiltered and at times unhinged musings. [According to Vincent Bugliosi, 82 people have, over the years, been accused of assassinating President Kennedy.]

Jill Abramson, "The Elusive President," The New York Times Book Review, October 27, 2013