8 athletes to watch at the Rio Olympics

Don't be surprised if you see these athletes on the medal stand this summer.

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Niek Kimmann, Netherlands: BMX

Niek Kimmann of the Netherlands is the reigning UCI BMX World Champion and leads the UCI world cup rankings. Kimmann, who will turn 20 this month, will be a medal favorite in Rio.

BMX racing is the newest Olympic cycling sport, combining intense racing, huge air and sometimes terrifying crashes. The format of the event is similar to motocross with eight racers charging simultaneously around an obstacle course; the winner is the first racer to finish.

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