At the Summer Olympic Games in Tokyo, Japan, in 2021, US track-and-field superstar Allyson Felix made history. Her bronze medal in the 400-meter race was the 10th medal of her career. It made Felix the most successful woman in the history of Olympic track and field. She later won a gold medal with the US women's relay team. Her 11 Olympic medals are more than any other US track-and-field athlete has earned. Find out how Felix became one of the greatest Olympic track-and-field champions.