Dana Vollmer of USA breaks women 's 100m butterfly record . New world mark for Cameron van der Burgh in men 's 100m breaststroke . The French gold rush then started with Camille Muffat in the women 's 400m from American Allison Schmitt with defending champion Rebecca Adlington taking a battling bronze for Team GB . Camille Muffat of France takes womens ' 400m with Rebecca Adlington third . Comment:
Dana Vollmer of USA breaks women 's 100m butterfly record . New world mark for Cameron van der Burgh in men 's 100m breaststroke . Camille Muffat of France takes womens ' 400m with Rebecca Adlington third . Comment: