Sir, I think for one thing, it's very likely to happen against our own deployed forces before too long. I know that's not North America, but still, if you're a Canadian warship, wherever you are, you're in Canada—sort of. So that's likely going to happen. We've already had imagery taken against us in a hostile manner. It's very likely that at some point somebody's going to do a terrorist attack using unmanned systems the way I mentioned.
How do we defend ourselves? It's the same way we do against all threats: watch for them, set up some systems, think about it. It's a very, very quickly emerging thing. The one thing that I've learned about a lot of our opposition is, as they say in the military, the enemy is just as smart as you are, but they're coming at it from a different perspective. So I think we're going to get surprised, no matter what we do.