vollmerrecord

Dana Vollmer exults in her new 100-meter butterfly record. (Martin Bureau -- Agence France Presse)

Dana Vollmer exults in her new 100-meter butterfly record. (Martin Bureau — Agence France Presse)

US swimmer Dana Vollmer celebrates after breaking the world record in the women’s 100m butterfly final swimming event at the London 2012 Olympic Games on July 29, 2012 in London. AFP PHOTO / MARTIN BUREAUMARTIN BUREAU/AFP/GettyImages