Kennedys keep vise-grip on RFK papers Robert Kennedy and John Kennedy during the Cuban missile crisis in October 1962. (Bettmann/CORBIS) By Bryan Bender Globe Staff / August 5, 2012 Boston Globe http://www.boston.com/news/nation/articles/2012/08/05/index_details_contents_of_robert_f_kennedys_papers/?page=full WASHINGTON — A trove of documents housed in a secure vault at the John F. Kennedy Library has long been described as Robert…