[John F. Kennedy speaking at press conference, Washington, DC]

[John F. Kennedy on S.S. Queen Mary sailing for London to visit his family]

[Cassius Clay]

[Buildings and haphazardly aligned railroad track segments, people in distance]

[Film still of Muhammad Ali and Joe Frazier from William Greaves's "Ali the Fighter"]

[Muhammad Ali signing copies of his autobiography "The Greatest," New York]

[Muhammad Ali]

[Muhammad Ali and Ken Norton, San Diego]