LONDON -- Here is the measure of Usain Bolt's brilliance. He eased up because he felt tightness in his back as he rounded the corner in the men's 200 meters Thursday at Olympic Stadium and, in his words, "cruised" to the finish line, a winner nonetheless in 19.32 seconds. That time, 19.32, is the Michael Johnson gold-shoes race from Atlanta in 1996. When we all thought that was untouchable.
That was before Bolt came along. He has re-defined everything.
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