Sir, the only thing I'd add, and I don't want to take up much of your time, is that there are two issues. One is the vehicle for delivering an attack, and the other is what you attack with, chemical weapons, nuclear weapons, and so on.
Non-proliferation efforts dealing with ordnance are very important to try to stop people from using those weapons, biological and other. The missile technology or drone technology can be picked up at Walmart or Canadian Tire. It's becoming so cheap and so easy. We have a little bit of benefit with the North Koreans that they are not very good at hitting their target, but that won't last. They will get better at it.
The idea of missiles is out there. We have to do what we can to make sure they are not containing anything that is truly a weapon of mass destruction, and that may be the best we can do.