40 percent of people who come to visit America on a visa overstay their visa and we have no idea where they are. On 9/11, at least 2 of the hijackers were here on visa. They were traveling back and forth to the Middle East. And we really had no idea where they were or what they were doing. And they were overstaying their visa. So there are problems I think in the immigration system that need to be fixed for our safety.