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    Usain Bolt's smile cracks up the Internet

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Usain Bolt's smile cracks up the Internet

The fastest human has a quick smile. CNN's Jeanne Moos reports Usain Bolt's smile cracks up the Internet.

Usain Bolt's smile cracks up the Internet

The fastest human has a quick smile. CNN's Jeanne Moos reports Usain Bolt's smile cracks up the Internet.