Only 11 horses have accomplished the Triple Crown, with the most recent being Affirmed in 1978.
Jockey: Steve Cauthen, who is seen here singing a picture of himself on Affirmed before the 2013 edition of the Kentucky Derby
Screen Gems Television
Library of Congress
Patrick Aventurier/Getty Images
Maddie Meyer/Getty Images
Sebastião Salgado via Wikimedia Commons
U.S. Marine Corps
CDC Public Health Image Library
Theo Wargo/Getty Images for Tony Awards Productions
iStock / DrGrounds
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