USADA testing is much more strict and advanced than anything Anderson Silva has ever faced during his title defenses. It's possible that he has been cheating for his entire career. If your friend stole $100 from your wallet, then it's possible the thief also took some money from you last year or even 5 years ago. It's just now that you're finding out about it. Stop acting like Anderson Silva broke your dream and sent you crying home to your mommy. The reality is the UFC is tainted when drug busts happen. Deal with it. It is completely unfair for a natural fighter to go up against someone who has an unnatural advantage with performance-enhancing drugs.