She did it again. After cruising through the opening rounds and semifinals, Sydney McLaughlin-Levrone asserted her dominance in the 400-meter hurdles finals, winning gold and setting a new world record of 50.37 seconds. It’s the fifth time she’s broken her own world record since first setting it in June 2021. USA’s Anna Cockrell finished second (51.87) and Netherlands’ Femke Bol third (52.15). This is Sydney’s second Olympic gold medal in the event and third overall (4x400m relay, 2020). She won her first 400mH gold in Tokyo three years ago, finishing in 51.46 seconds, the previous Olympic rec…