ABC News allegedly canceled a documentary about John F. Kennedy and Robert F. Kennedy’s rumored involvement in Marilyn Monroe’s death in an effort to protect the pair’s legacies, RadarOnline.com has learned. In a surprising development to come nearly 62 years after Monroe was found dead inside her Los Angeles home on August 5, 1962, it was revealed that ABC News canceled a 1985 TV special about the Kennedy brothers’ alleged involvement in her tragic passing at age 36. That is the bombshell claim made by author and Daily Mail columnist Maureen Callahan in her new book, Ask Not: The Kennedys and…