Naser stuns the world with fastest 400m time since East German Koch
Rai Benjamin heads to Tokyo Olympics after second fastest 400m hurdles
Indianapolis sprinter Lynna Irby wins in Monaco with world's best time of 2020
Niekerk breaks 400m world record - DTNext.in
400 Metres
Wayde van Niekerk smashes Michael Johnson's record to claim 400m gold | Rio 2016 | The Guardian
4 × 400 metres relay - Wikipedia
How van Niekerk broke the 400m world record
Dakota State University Athletics - DSU women's 4 x 400-meter relay hit third fastest time in school history at 2021 Drake Relays
USA Track Olympic Trials: Lynna Irby advances in 400 meters
She once single-handedly won a team track title for UMass Boston, and now her sights are set on the Olympics - The Boston Globe
Kenny Selmon Claims National Title in 400-Meter Hurdles, Earns Spot on Team USA - Chapelboro.com
Matthew Boling runs fastest high school 100 meters in history in 9.98 seconds - The Washington Post
Tyler Johnson Runs Nation's Fastest 400-Meter Time, Wins Three Gold Medals to Highlight Ohio State's Performances at Big Ten Indoor Championships | Eleven Warriors
43.03 – The Fastest 400m in History – Žiga P. Škraba
400 metres at the Olympics - Wikipedia
Day 2 Recap: 2013 Prefontaine Classic - FloTrack
Jones dashes to world's second-fastest 400 time - Horns Illustrated
400 METER WORLD RECORD || WHO WILL BREAK IT? - YouTube
Brilliant Van Niekerk smashes 400m world record | Reuters
New York runner sets second-fastest time in nation in 400, does it without starting blocks | USA TODAY High School Sports
Blazing time for SAU's Kalawan - HBCU Gameday
