Gold medalist: Losing is not an option

Tirunesh Dibaba takes gold in the 10,000m at the London Olympics Games in 2012.
Tirunesh Dibaba takes gold in the 10,000m at the London Olympics Games in 2012.

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    Gold medalist: Losing is not an option

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Three-time Olympic champion Tirunesh Dibaba reveals how Ethiopia breeds some of the world's best long distance runners.