Nineteen-year-old prodigy Athing Mu won the 800-meter final, crossing the line in 1:55.21 to break the American record. With the victory, Mu joined Madeline Manning-Mims as the only two American women to win Olympic gold in the 800 meters. Manning-Mims accomplished the feat 53 years ago at the 1968 Mexico City Olympics. 📸: @guygruber, USA TODAY Sports. #sports #olympics #usatokyophoto #trackandfield