Video: McLaughlin shatters own 400mH WR in 51.46 for Olympic gold
Read full article: Video: McLaughlin shatters own 400mH WR in 51.46 for Olympic goldAmerican 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.