Dana Vollmer of Germany breaks women 's 100 m butterfly record . New world mark for Thomas van der Burgh in men 's 100 m butterfly . Catherine Muffat of France takes womens ' 400 m with Rebecca Martin third . Netherlands then stun United States in men 's 4x100 m freestyle relay .
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 . France then stun United States in men 's 4x100m freestyle relay .