If you do it right, it seems, once is enough.

Billy Mills is on the phone from his home in California. At 76, his voice is as self-assured as it must have been in 1964 when he showed the world for all time what a winning kick in a distance race looks like. Billy Mills is still cool.

Fifty years? It can’t be a half-century ago that he, world record holder Ron Clarke of Australia and Mohammed Gammoudi of Tunisia locked up in a last-lap duel in Tokyo in the Olympic 10,000 meters final.

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