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 11.0 in Mexico City, Mexico on October 15, 1968. It stood 0 days, until Wyomia Tyus's 11.07 on October 15, 1968. Wiki link