Sister gives up Olympics spot to twin

Lanny Barnes of the US competes in the women's Biathlon 4x6 km relay at the Whistler Olympic Park during the Vancouver Winter Olympics on February 23, 2010. AFP PHOTO / FRANCK FIFE (Photo credit should read FRANCK FIFE/AFP/Getty Images)

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    Sister gives up Olympics spot to twin

Twin sisters Tracy and Lanny barnes are biathletes with Olympic dreams but only one is heading to Sochi.