From ESPN.com…..
Sydney McLaughlin broke the world record in the women’s 400-meter hurdles on Sunday night and qualified for her second Olympic Games during a heat-delayed final day of the U.S. Olympic track and field trials.
The 21-year-old recorded a time of 51.90 seconds, becoming the first woman to break the 52-second barrier.
Dalilah Muhammad, who finished second in Sunday’s final, was the previous record holder at 52.16 seconds.
McLaughlin knelt to the ground after crossing the finish line and covered her mouth in disbelief when she saw the time on the scoreboard. Muhammad was the first to congratulate her with a celebratory hug.
