Lance Armstrong doping allegations: Will they stick?

http://www.nma.tv/ Lance Armstrong remains adamant that he never cheated in the wake of a Sports Illustrated article detailing allegations of systematic doping during a career that saw the cyclist recover from testicular cancer and win the Tour de France a record seven times. Armstrong has always denied taking performance-enhancing drugs and points out that he has never tested positive for them. "Great to hear that USADA is investigating some of SI's claims. I look forward to being vindicated," Armstrong tweeted after the story was published online. Lance Armstrong has inspired cancer patients around the world and raised millions of dollars for cancer research through his Livestrong foundation. How would his legacy be affected — and how would his fans feel — if any of the allegations against him are proven true? Read the SI story here: http://cnnsi.printthis.clickability.com/pt/cpt?expire=&title=AS+THE+CYCLIST+AND+CANCER+CRUSADER+FACES+-+01.24.11+-+SI+Vault&urlID=444880637&action=cpt&partnerID=289881&fb=Y&url=http%3A%2F%2Fsportsillustrated.cnn.com%2Fvault%2Farticle%2Fmagazine%2FMAG1180944%2Findex.htm