South African beats Michael Johnson's 17-year-old 400m world record for gold – The Denver Post
Michael Johnson Sevilla 1999: Men's 400m world record - YouTube
Karsten Warholm Sets World Record in 400-Meter Hurdles - The New York Times
Sydney McLaughlin Breaks The World Record in the 400m Hurdles - Women's Running
South Africa's Wayde van Niekerk Breaks Olympics 400m World Record - Face2Face Africa
Sydney McLaughlin Runs 50.68 to Destroy 400m Hurdles World Record - LetsRun.com
Sydney McLaughlin pushes boundaries with huge 400m hurdles world record | World Athletics Championships | The Guardian
South Africa's Wayde van Niekerk Sets World Record in the 400 - WSJ
Niekerk breaks 400m world record || Niekerk breaks 400m world record
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
Women's 400m World Record is 48.25 – Žiga P. Škraba
Men's 400m world record holder Van Niekerk tests positive for coronavirus
Brilliant Van Niekerk smashes 400m world record | Reuters
: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
Van Niekerk smashes world record to grab Olympic 400m glory - Olympic News
Karsten Warholm breaks men's 400 hurdles world record in Norway
Sydney McLaughlin breaks her own 400-meter hurdles world record | CNN
Blake Leeper breaks Oscar Pistorius' 400 metre Paralympic World record
How van Niekerk broke the 400m world record
Sydney McLaughlin breaks her own world record in 400m hurdles at World Athletics Championships - CBSSports.com
World 400m champion banned for two years
