Armstrong's Ahab

This anti-doping cop brought down a cycling icon

Travis Tygart's first office at the United States Anti-Doping Agency (USADA) had a poster of Lance Armstrong in it featuring a version of this quotation: "Everybody wants to know what I am on. What am I on? I am on my bike, busting my ass six hours a day."

But over the past four months, Tygart, a lawyer who is now the CEO of USADA, has been the one doing the busting, driven by the same relentlessness and competitiveness that are Armstrong's hallmarks. Tygart has redrawn the heroic cyclist--cancer survivor, philanthropist and seven-time Tour de France winner--as a poster boy for...

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