Shaunae Miller dives to beat Allyson Felix in 400m final at Rio Olympics - CNN
Rio 2016: Brilliant Wayde Van Niekerk smashes Michael Johnson's 400m world record - Rio Olympics 2016 (Australian Broadcasting Corporation)
Report: men's 400m heats – Rio 2016 Olympic Games| News
Athletics at the 2016 Summer Olympics – Women's 400 metres hurdles - Wikipedia
Rio 2016: Brilliant Wayde Van Niekerk smashes Michael Johnson's 400m world record - Rio Olympics 2016 (Australian Broadcasting Corporation)
Rio Olympics 2016: drama in 400m and David Rudisha wins 800m – day 10 as it happened | Sport | The Guardian
Report: men's 400m semi-finals – Rio 2016 Olympic Games| News
EWNSPORTINGMOMENTS: How Wayde van Niekerk shook the world
![Kirani James [GRN] - Men's 400m | Champions of London 2012 - YouTube](https://i.ytimg.com/vi/_h7gFkvHqTU/maxresdefault.jpg "Kirani James [GRN] - Men's 400m | Champions of London 2012 - YouTube")
Kirani James [GRN] - Men's 400m | Champions of London 2012 - YouTube
Swimming at the 2016 Summer Olympics – Women's 400 metre individual medley - Wikipedia
Japan's 2016 Olympic Medal Winners (Photo Gallery) | Nippon.com
Shaunae Miller's dive denies Allyson Felix 400m gold in dramatic final | Sport | The Guardian
Olympic Swimming 2016: Women's 400M Individual Medley Medal Winners and Times | Bleacher Report | Latest News, Videos and Highlights
Olympic Track and Field 2016: Men's 1,500M Medal Winners, Times and Results | Bleacher Report | Latest News, Videos and Highlights
Olympic Track and Field 2016: Men's 400M Medal Winners, Times and Results | Bleacher Report | Latest News, Videos and Highlights
SportsCenter on Twitter | Allyson felix, Track and field athlete, Olympic medals
Report: men's 400m semi-finals – Rio 2016 Olympic Games| News
How Twitter reacted to Van Niekerk's GOLD | TeamSA
400 metres at the Olympics - Wikipedia
Nirmala Sheoran Profile: Nirmala Sheoran Biography, Stats, Athlete, Women 400 metres
400m women - Olympic Athletics
All Australia's medals won at the Rio 2016 Olympic Games | Daily Telegraph
South African beats Michael Johnson's 17-year-old 400m world record for gold – The Denver Post
