Two Americans Broke the World Record in the 400 Hurdles. Only One Could Win Gold. - WSJ
Women's 400m Final | World Athletics Championships - YouTube
Norway's Warholm breaks 29-year-old 400m hurdles world record - CGTN
Sydney McLaughlin-Levrone eyes Marita Koch's 400-meter world record
13-Year-Old 47s 400m WORLD RECORD! - YouTube
Bol breaks long-standing world indoor 400m record | Reuters
Van Niekerk smashes world record to grab Olympic 400m glory - Olympic News
400 METER WORLD RECORD || WHO WILL BREAK IT? - YouTube
Mohammad Anas smashes 400m national record to qualify for World Championships | More sports News - Times of India
Rio 2016: Wayde van Niekerk smashes Michael Johnson's 400m world record to clinch gold | Olympics 2016 | Sport | Express.co.uk
Track & Field Worlds 2022: Wayde van Niekerk, Kirani James and Michael Norman chasing 400m gold: Preview, schedule & how to watch
South African beats Michael Johnson's 17-year-old 400m world record for gold – The Denver Post
400 metres - Wikipedia
Sydney McLaughlin Beat Dalilah Muhammad, Set a New World Record and Won Gold - The New York Times
Karsten Warholm smashes 400m hurdles world record in one of greatest races in history | Tokyo Olympic Games 2020 | The Guardian
Wayde van Niekerk: The race for my 400m world record
We've All Been Waiting For This... || The 400 Meter World Record - YouTube
Sydney McLaughlin breaks her own 400-meter hurdles world record | CNN
Wayde van Niekerk wins gold, sets world record in 400m - Sports Illustrated
Femke Bol sets new indoor women's 400m world record with 49.26s - CGTN
Wayde van Niekerk Runs 43.03, Breaks 400m World Record! - FloTrack
Wayde van Niekerk smashes Michael Johnson's record to claim 400m gold | Rio 2016 | The Guardian
Femke Bol breaks 41-year world record in the women's indoor 400 meters | CNN
Michael Johnson Sevilla 1999: Men's 400m world record - YouTube
Men's 400m world record holder Van Niekerk tests positive for coronavirus
Van Niekerk betters 400m world record
