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Associated Press
FILE - This Oct. 16, 2012 file photo shows Travis Tygart, the CEO of the U.S. Anti-Doping Agency, speaking during an interview at his office in Colorado Springs, Colo. It would have been easy for Tygart and his investigators to simply give up on nailing Lance Armstrong. But Tygart pressed on, eventually building a case that tore apart the facade Armstrong had created, detailing a widespread and systematic doping scheme on a level not seen before in organized sports. (AP Photo/Ed Andrieski, File)

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