What is the Triple Crown in horse racing?
The races are run at Churchill Downs, Pimlico Race Course and Belmont Park over seven weeks. To win or sweep the Triple Crown, a horse must win all three races.
One of the most difficult feats in horse racing, it has been accomplished only 13 times, most recently by Justify in 2018.
The other winners were Sir Barton (1919), Gallant Fox (1930), Omaha (1935), War Admiral (1937), Whirlaway (1941), Count Fleet (1943), Assault (1946), Citation (1948), Secretariat (1973), Seattle Slew (1977), Affirmed (1978) and American Pharoah (2015).