Despite companies' efforts to fight forgery, bogus Gucci bags seem as plentiful as ever. And today, counterfeiters are also ripping off drugs, car parts, and electronics that not only cost jobs, but also lives. And it's not just US corporations feeling the pinch: in the developing world, counterfeit goods are killing local industries and hindering economic growth. But not everyone agrees on how far enforcement measures should go and what they can accomplish. The challenges of catching the copycats.