Felix becomes most decorated female track athlete in U.S. history

Allyson Felix became the most decorated female track and field athlete in U.S. history, after winning silver in the 400m Monday.

Felix posted a 49.51 mark, losing to Bahamas' Shaunae Miller in exhilarating fashion. Miller dove across the line, stretching past Felix to win gold with a mark of 49.44.

It is the seventh Olympic medal of Felix's career, surpassing Jackie Joyner-Kersee for the most career medals won by a female American track athlete.

Most notably, Felix won three gold medals in 2012, capturing the 200m while helping the U.S. secure victories in the 4x100 and 4x400m relays.