Wyomia Tyus is a retired American track and field sprinter, and the first person to retain the Olympic title in the 100 m. Wyomia Tyus (United States) set the women's 100 m world record of 11.2 in Tokyo, Japan on October 15, 1964. It stood 9 months, until Ewa Kłobukowska's 11.1 on July 9, 1965. Wiki link