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51 Dead After Massive Tornado Rips Through Oklahoma

Extreme Adventure Biking

For these bikers, potential peril exists in every curve of the road.

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A Matter of Fog and Faith

Bolivia Adventure Bikers

The ride starts in La Cumbre, almost 3 miles (16,000 feet) above sea level, above the clouds. The paved section of the road is just below the camera. (Jeffrey Kofman/ ABC News)

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