2016 Olympics, track and field results: Allyson Felix wins 6th

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.

2016 Olympics, track and field results: Allyson Felix wins 6th

U.S. women win sixth consecutive 4×400-meter relay, Allyson Felix

Allyson Felix - Wikipedia

Allyson Felix - Wikipedia

Allyson Felix Biography, Olympic Medals, Records and Age

Ailing Allyson Felix faces unexpected challenge just qualifying at

Bolt: 9 events, 9 gold; Felix (5) all alone

17) Shaunae Miller-Uibo retains gold in women's 400m as Allyson

World leads fall on third day of US Olympic Trials

Tokyo Day 15 Highlights: Allyson Felix Wins Her 11th Olympic Medal

Olympic Track And Field Trials Allyson Felix Shows Burst To