It may be the most Exciting 20 seconds in sports. No, not Mike Tyson's next fight—although this showdown, like a heavyweight bout, will feature two undisputed world champions, a ton of trash talk and even a prime-time-TV showcase. This contest will take place on a Sacramento, Calif., track, not in a Las Vegas ring. On Sunday the U.S. Olympic Track and Field Trials culminate in a much-hyped and sure-to-be-much-watched duel at 200 meters.
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