Robert T. Littell and John F. Kennedy Jr. ROBERT T. LITTELL WATCHING KENNEDY GROW BY RONALD SKLAR It’s hard to believe that John F. Kennedy, Jr. has been dead for over five years. For a young man so full of life and promise (his father called it “vigor”), he was able to form an uneasy existence with the label that was foisted upon him: “American prince.” He handled über-fame and impossible expectations with such dignity, grace and humor that we almost took for granted the amo