Diane Hoffman, 91, Breaks 400-Meter World Record USATF New England
Karsten Warholm breaks 400m hurdles world record
400 metres - Wikipedia
Breanna Clark breaks own world record to defend 400m Paralympic title - OlympicTalk | NBC Sports
:format(png)/cdn.vox-cdn.com/uploads/chorus_image/image/50388485/Screen_Shot_2016-08-14_at_9.02.30_PM.0.0.png "Olympics 2016 results: Wayde van Niekerk sets world record from lane 8 in men's 400m run - SBNation.com")
Olympics 2016 results: Wayde van Niekerk sets world record from lane 8 in men's 400m run - SBNation.com
Men's 400m world record holder Van Niekerk tests positive for coronavirus
Women's 400m World Record is 48.25 – Žiga P. Škraba
Sydney McLaughlin wins gold with world record in 400 hurdles - Los Angeles Times
Sydney McLaughlin Breaks the 400-Meter Hurdles World Record—Again - WSJ
400 METER WORLD RECORD || WHO WILL BREAK IT? - YouTube
Norway's Karsten Warholm smashes 400-meter hurdles world record to win gold - The Boston Globe
Karsten Warholm Sets World Record in 400-Meter Hurdles - The New York Times
Wayde van Niekerk wins gold, sets world record in 400m - Sports Illustrated
We've All Been Waiting For This... || The 400 Meter World Record - YouTube
Wayde van Niekerk breaks 400m world record to win gold - YouTube
The men's 400 world record moves rarely, but it does move dramatically
Warholm sets new world record of 46.70s in men's 400m hurdles with stunning Oslo run
Rio Olympics 2016: Usain Bolt proposes match race with
Wayde van Niekerk: Five things to know about the Olympic 400m champion and world record holder
Wayde van Niekerk: South African smashes 400-meter world record to take gold | CNN
Sydney McLaughlin breaks her own world record in 400m hurdles at World Athletics Championships - CBSSports.com
South Africa's Wayde van Niekerk Sets World Record in the 400 - WSJ
Sydney McLaughlin Breaks Her Own 400-Meter Hurdles World Record - The Seattle Medium
Wayde van Niekerk smashes Michael Johnson's record to claim 400m gold | Rio 2016 | The Guardian
