Rio Olympics 2016: Wayde van Niekerk breaks world record to win Olympic gold - BBC Sport
Report: women's 400m - IAAF World Athletics Championships Doha 2019 | REPORT | World Athletics
The greatest race ever part II: Sydney McLaughlin wins 400m hurdles gold in world record time | Tokyo Olympic Games 2020 | The Guardian
Femke Bol sets new indoor women's 400m world record with 49.26s - CGTN
Canada's women run to national indoor record in 400m relay at world championships | CBC Sports
Women's 400m Final | World Athletics Championships - YouTube
Van Niekerk betters 400m world record
Two Americans Broke the World Record in the 400 Hurdles. Only One Could Win Gold. - WSJ
McLaughlin breaks own 400 meters hurdles record with 'Track Town, USA' magic | Reuters
Femke Bol breaks 41-year world record in the women's indoor 400 meters | CNN
Records Fell at the Track Worlds. A Trend? Not So Fast. - The New York Times
Karsten Warholm and Rai Benjamin Both Broke a Record, But Only One Won Gold - The New York Times
The men's 400 world record moves rarely, but it does move dramatically
Wayde van Niekerk: The race for my 400m world record
Sydney McLaughlin Broke Her Own World Record. Again. - The New York Times
400 metres - Wikipedia
Wayde van Niekerk sets a 400-meter record that no one saw coming - The Washington Post
Bol breaks world indoor 400m record with 49.26 in Apeldoorn | REPORT | World Athletics
Sydney McLaughlin Beat Dalilah Muhammad, Set a New World Record and Won Gold - The New York Times
Tokyo Olympics Daily: Karsten Warholm wins greatest ever men's 400m hurdles
Sydney McLaughlin breaks her own 400-meter hurdles world record | CNN
Rio Replay: Men's 400m Sprint Final - YouTube
Bol breaks long-standing world indoor 400m record | Reuters
Bol finds 400m record in her dream world | FEATURE | World Athletics
