Felix cruises, Sanya says goodbye – and a Bolt from Jamaica (Yahoo Sports)

Allyson Felix ran through the pain. On a night Felix successfully auto-piloted her injured right ankle through 400-meter qualifying to keep her chance at a 200-400 double alive, Richards-Ross bid a tearful adieu to the fans, after pulling up 250 meters into her lap around the track – her hamstring too tight to carry on. ”I’ve had an amazing career,” the 31-year-old Richards-Ross said.