Sydney McLaughlin breaks women's 400m world record in front of home crowd | Sports | dailyemerald.com
Mighty McLaughlin shatters 400 metres hurdles world record | Reuters
Norway's Warholm breaks 400 metres hurdles world record | Reuters
Wayde van Niekerk: South African smashes 400-meter world record to take gold | CNN
Usain Bolt - Wikipedia
400 METER WORLD RECORD || WHO WILL BREAK IT? - YouTube
400 Metres Hurdles
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How do lane assignments and starting spots work in track? - SBNation.com
Track's Most Resilient (and Suspect) Record Is in Danger - The New York Times
Karsten Warholm Sets World Record in 400-Meter Hurdles - The New York Times
The World Record Suspicion survey, and some related thoughts
400 metres hurdles - Wikipedia
400 Metres
4 × 400 metres relay - Wikipedia
Michael Norman puts world record on notice at Mt. SAC relays – Orange County Register
400 metres - Wikipedia
Tokyo Olympics: List Of World Records Set | Olympics News
Day 12 recap: Women's 400-meter hurdles world record obliterated at Tokyo Games | The Japan Times
Dalilah Muhammad Breaks Her Own World Record in the 400-Meter Hurdles - The New York Times
Sydney McLaughlin breaks women's 400 metres hurdles world record ahead of Tokyo Olympics - ABC News
Brilliant Van Niekerk smashes 400m world record | Reuters
Tokyo Olympics: New world record by Warholm of Norway in 400m hurdles
Van Niekerk betters 400m world record
