The U.S. current Olympic champions, gained his third consecutive victory in the World, led by its star Michael Phelps, who joined as its first gold in his first appearance in the Roman Pool.
France, the race favorite for its outstanding results in recent months, got her first lead in the World-2009, but did not break the 'curse' and still not win a relay in a big event.
Games in Beijing-2008, the French staged an pulse anthological with the Americans and finished second after a final release with Alain Bernard.
The surprise came from Russia, located in the hall number 8 and was less than, at the battle for victory in the final.
Representatives from Brazil, with Cesar Cielo in front, rozaron any medals, but were finally quarters.