Yes, I know that. But I think Ridge and Bush said it will keep out terrorists. But it has been successful in catching imposters with US visas and fake visas. The US-Visit program brings up the picture printed on the visa into the officers screen, so it a good deterrent against being altered or faked. And the biometric data collected at the US consulate when a non-immigrant visa is issued is matched when you arrive into the US I'm told.