US Anti-Doping Agency Charges Armstrong

For Lance Armstrong, the doping allegations aren't going away. In fact, they're starting all over again.

The U.S. Anti-Doping Agency has filed formal charges against the seven-time Tour de France winner, threatening to strip him of his victories in the storied cycling race.

Armstrong, who forcefully denied the accusations, could face a lifetime ban from the sport if he is found to have used performance-enhancing drugs. The move by USADA immediately bans him from competing in triathlons, which he turned to after he retired from cycling last year.

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