DOWN GOES THE U.S. RECORD! 🇺🇸✨ Sydney McLaughlin-Levrone just broke the U.S. record with a 48.29 19 years to the day after it was set by Sanya Richards-Ross in Athens! The 400m hurdles world record holder will take on the open 400 final at the #WorldAthleticsChampionships on September 18 at 6:24 AM PT!