In his doping confessional to CBS's 60 Minutes, Tyler Hamilton not only tells of witnessing teammate Lance Armstrong's use of the banned blood-boosting agent EPO when they rode together on the U.S. Postal Service team from 1995 to 2001, but he also delivers a blow to Armstrong's longtime defense against such allegations: "Never a failed test," Armstrong tweeted in response to Hamilton's remarks. "I rest my case."
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