The dark space is one of the biggest concerns on the part of counterterrorism officials right now. Comey did a good job of explaining how they jump into a direct messaging box and then go into platforms designed specifically to be secure. There's no way, even if we have a lawful court order, to be able to access those communications.
In Europe, you have very different situation than you do in the United States. In Europe, it's very segregated. And you have the diasporas in Belgium that I saw. And they're being radicalized because they're not assimilated with the culture. I don't think we have that same situation in the United States.