 I and many other people thought the death of Bin Laden and the Arab Spring would basically make terrorism a sort of much less significant national security concern, but in fact that was wrong. And the Arab Spring inaugurated civil war and anarchy in much of the Middle East out of which sprang ISIS, so we continue to have this problem. The reason that many Americans remain concerned about terrorism and the reason that it's a big issue in the current presidential campaign, you can make the argument that a lot of Donald Trump's success has been because of his supposed plans to deal with terrorism. The fact is that every time there's some kind of terrorist incident people put it in the frame of 9-11 and continued to do so and even though that's probably not entirely rational because we're not going to see another 9-11 or anything close because we're much more well defended now. The fact is that it's still a central national security concern.