"After tomorrow those godd-n Kennedys will never embarrass me again. That's not a threat. That's a promise." – LBJ to his mistress Madeleine Brown on the eve of JFK assassination Did LBJ have JFK killed? This question has endured ever since that fateful day of 50 years ago – Nov. 22, 1963. Former Nixon White House adviser and self-proclaimed "GOP hit man" Roger Stone makes this central argument in his new book, "The Man Who Killed Kennedy: The Case Against LBJ." Stone's very interesting narrative isn't another "conspiracy theory" book to add to the already voluminous number of fantastical JFK...