(AP) NEW YORK - U.S. Olympic track and field athletes will wear uniforms at the London Summer Olympics that Nike says could shave up to 0.023 seconds off 100-meter sprint times — a difference that could have elevated Walter Dix from bronze to the silver medal at the Beijing Olympics.

Dix still wouldn't have caught the fastest man in the world that day. Usain Bolt of Jamaica simply ran away from the field in the final, setting a world record that he would later break again.

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