Kimberlyn Duncan, left, reacts with Allyson Felix after winning the senior women's 200-meter dash at the U.S. Championships athletics meet on Sunday, June 23, 2013, in Des Moines, Iowa. (AP ... more 
Kimberlyn Duncan, left, reacts with Allyson Felix after winning the senior women's 200-meter dash at the U.S. Championships athletics meet on Sunday, June 23, 2013, in Des Moines, Iowa. (AP Photo/Charlie Neibergall) less 
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Associated Press | Photo By Charlie Neibergall
Sun, Jun 23, 2013 7:17 PM EDT