Sydney McLaughlin-Levrone shocked the crowd in Tokyo, running 48.29 to set a new U.S. record in the women’s 400m semifinal. The performance makes her the seventh-fastest woman of all time at the distance as she advances to the final. Website: http://flosports.link/3p20lTj Subscribe: http://flosports.link/3p4YLQp Get the FloSports iOS app: http://bit.ly/FloTrackiOSApp_9 Follow FloTrack Facebook: https://www.facebook.com/FloTrack Twitter: https://twitter.com/flotrack Instagram: https://www.instagram.com/FloTrack