FILE - In this Feb. 22, 2009 file photo,  Lance Armstrong prepares for the final stage of the Tour of California cycling race in Rancho Bernardo, Calif.  The U.S. Anti-Doping Agency is bringing doping charges against the seven-time Tour de France winner, questioning how he achieved those famous cycling victories.  Armstrong, who retired from cycling last year, could face a lifetime ban from the sport if he is found to have used performance-enhancing drugs. He maintained his innocence, saying: &quot;I have never doped.&quot; (AP Photo/Marcio Jose Sanchez, File)