FILE - In this Nov. 25, 1963 file photo, the caisson bearing the flag-draped coffin of President John F. Kennedy moves in procession down Pennsylvania Avenue, in Washington, en route to Arlington National Cemetery. Kennedy's funeral was attended by “28 presidents, prime ministers and kings.” As the horse-drawn coffin moved through Washington, “streets were lined by hundreds of thousands of people, many of them weeping.” (AP File Photo)