That's a good question. I'm not entirely sure, because in a way it doesn't directly travel through physical elements across borders. But it definitely is a law enforcement issue, and I definitely think that immigration authorities need to be aware if any means of cyber warfare are being transferred across the border.
I'll give you a small example. In November 2011, our drug enforcement administration caught an element in Mexico that was working through the Iranian embassy—Mexicans working through the Iranian embassy—to transfer different types of parts to do cyber warfare. They were arrested because they were trying to obtain the codes for the servers of defence and intelligence agencies here in the U.S. That was a law enforcement issue that was a collaboration of the border patrol agents and the drug enforcement administration, which aren't the typical entities that focus on these types of threats, but they caught it because they were well aware of the situation. In that sense it might cross over a little, but I wouldn't entirely put it in the category of immigration.