Whoever Wears This Rocket-Powered Prosthetic Ankle Is Guaranteed Olympic Gold

When the International Olympic Committee approved the prosthetic blades that replace Oscar Pistorius's artificial legs when running, they set a precedent that could be hard to manage down the line. What was the committee's criteria for approving them, and why should one prosthetic be allowed and not another? There's no definitive answer yet, but it's a safe bet that a rocket-powered prosthetic ankle probably won't make the cut. More »