It may be years before a Paralympic winter athlete can challenge normally abled competitors in skiing or snowboarding, as Oscar Pistorius did in the 2012 Summer Olympic Games, according to this article. One reason is the complexity of prosthetic design required to deal with everything from cold and snow to absorbing shock and making tight twists and turns. "There's a whole lot more involved to get that ski to turn than if it's just the foot planted," said Bill Beiswenger, owner and co-founder of Abilities Unlimited in Colorado.

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