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AUSTIN -- More than 113,000 fans were in the stands at theCircuit of the Americas on Sunday for the U.S. Grand Prix.

The gates opened late when a police dog detected a potential threat during a security sweep, according to the Travis County Sheriff's Office. They found no problems and fans were let in after a 30-minute delay.

Fans lined the track and cheered as the race started at 1 p.m. Fans also got to see the University of Texas Longhorn Band, the Dallas Cowboy cheerleaders and the Circuit of theAmericas girls.

Red Bull driver Sebastian Vettel won the race, his eighth consecutive Formula One win.

It's a great track, Vettel said. So many people around the track. It's one of the best years we have. Ithink it's one of the things people can learn from the American approach to sport.

I used my earphones selectively. Ido want to hear how loud they are, said race fan James Zapata.

[We] just happened to get lucky and have a track in our backyard, said race fan Lisa Kraft.

On the first lap, one of the drivers for the Force India team lost control after a driver clipped his wheel prior to the race.

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