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The sun rises over Sochi's Olympic Park on January 10, 2014. An estimated 3 billion people are expected to watch the Olympics on television.
The sun rises over Sochi's Olympic Park on January 10, 2014. An estimated 3 billion people are expected to watch the Olympics on television.

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Olympian Roberto Carcelen gives his perspective on security concerns before the Sochi Olympics.

Athlete: 'We don't know what to expect'

Olympian Roberto Carcelen gives his perspective on security concerns before the Sochi Olympics.