Billy Mills, an Oglala Lakota runner and Olympic legend, was born on the Pine Ridge Indian Reservation in South Dakota and became an orphan at 12. After attending Haskell Institute and the University of Kansas, he joined the U.S. Marine Corps before winning the 10,000-meter race in one of the greatest upsets in Olympic history at the 1964 Tokyo Games. He is the only American to have won the event and co-founded the Running Strong for American Indian Youth charity, which supports Indigenous communities.