US Grand Prix - Sebastian Vettel happy to win constructors' title

Sebastian Vettel is "very happy for the team" after his second place in the US Grand Prix won Red Bull Racing their third successive constructors' championship.

Vettel led for most of the race at the Circuit of the Americas, but "ran into traffic at the wrong time" as he lost time lapping HRT's Narain Karthikeyan which gave Lewis Hamilton a chance to overtake and go on to claim the race win in Texas.

Vettel's team-mate Mart Webber retired early on in the race with an alternator failure.

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