Video: McLaughlin shatters own 400mH WR in 51.46 for Olympic gold

Sydney McLaughlin, of the United States, wins the women's 400-meter hurdles final at the 2020 Summer Olympics, Wednesday, Aug. 4, 2021, in Tokyo, Japan. (AP Photo/Petr David Josek) (Petr David Josek, Copyright 2021 The Associated Press. All rights reserved)

American Sydney McLaughlin obliterated her own 400m hurdles world record from U.S. Trials by nearly a half-second in 51.46, unseating defending Olympic champion teammate Dalilah Muhammad for gold at the Tokyo Olympics.