2016 Olympics, track and field results: Allyson Felix wins 6th gold medal with 4x400 relay win

The men's and women's teams won gold in the 4x400, plus Matthew Centrowitz won the first gold for the US since 1908 in the 1500 meters.

Trojans Earn 5 Gold Medals, Allyson Felix Becomes USA's All-Time Track Leader In Olympic Medals - USC Athletics

Allyson Felix's Olympic dreams continue to shine bright - Los Angeles Times

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Allyson Felix - Wikipedia

Allyson felix olympic hi-res stock photography and images - Page 3 - Alamy

9) USA cruises to gold in men's 4x400m relay

Allyson Felix sets a record, wins bronze for 10th Olympic medal

Allyson Felix Wins Silver Medal During Women's 400M at 2016 Olympics, News, Scores, Highlights, Stats, and Rumors

Allyson Felix shifts into high gear to win the women’s 400 - Los Angeles Times

Olympic sprinter Allyson Felix breaks Usain Bolt's world record just 10 months after giving birth

In Final World Championships Race Allyson Felix Snags Medal No. 19 With Mixed 4x400 Team - Team USA

U.S. women's track and field team keeps raking in medals in Rio Olympics

Rio Olympics: Shaunae Miller Dives to Gold in 400 Meters - The New York Times

Rio Olympics results: Allyson Felix, USA outlast Jamaica for 4x400m relay gold

Olympics Rio 2016: Allyson Felix wins sixth gold as US win 4x400m relay, GB take bronze - Eurosport