2019 World Athletics Championships – Men's 400 metres - Wikipedia
Michael Johnson Sevilla 1999: Men's 400m world record - YouTube
World 400m champion banned for two years
Milkha Singh: Did he ever hold the 400m world record? 'Bhaag Milkha Bhaag' makes major goof by claiming he did
McLaughlin smashes her own world record to win epic women's 400m hurdles final
Fastest since 1985, Naser wins women's world 400-meter
Track roundup: van Niekerk blows away 400 standard
Tokyo 2020, athletics: Indian men's 4x400m relay set new Asian Record with superb run, miss on final
Those 400 metres in Rome: Heartbreak that won fans over | Sports News,The Indian Express
The greatest race ever part II: Sydney McLaughlin wins 400m hurdles gold in world record time | Tokyo Olympic Games 2020 | The Guardian
Sydney McLaughlin Beat Dalilah Muhammad, Set a New World Record and Won Gold - The New York Times
Karsten Warholm destroys 400 meter hurdles world record in Olympic final - Sports Illustrated
Hima Das reacts after historic 400m gold: Thank you for the support, India - Sports News
Sydney McLaughlin Breaks The World Record in the 400m Hurdles - Women's Running
400 METER WORLD RECORD || WHO WILL BREAK IT? - YouTube
We've All Been Waiting For This... || The 400 Meter World Record - YouTube
Breanna Clark breaks own world record to defend 400m Paralympic title - OlympicTalk | NBC Sports
Champion Allison Breaks School Record in 400 Meters, Florida Advances 7 Entries to Friday's Finals - Florida Gators
Karsten Warholm smashes 400m hurdles world record in one of greatest races in history | Tokyo Olympic Games 2020 | The Guardian
Niekerk breaks 400m world record || Niekerk breaks 400m world record
