Olympics: Dana Vollmer sets world record to win 100-meter butterfly at London

Ex-Cal star Dana Vollmer sets WORLD RECORD of 55.98 to win gold medal in 100-meter butterfly final at London.

Vollmer, 24, won by nearly a full second over runnerup Yu Ling of China. Sweden’s Sarah Sjostrom, the former record holder, was a distant fourth.

Jeff Faraudo