We can't be French and Muslim at the same time. And that's exactly what ISIS wants that population to think.

I think the vetting we have for refugees is vastly better than the Europeans have.

I think the refugee problem is Europe is vastly worse than we have in the United States.

We have a Muslim population which is better off economically, better engaged, and less drawn to the fight in ISIS. But as we've seen in places like California and elsewhere, we still have a threat, even if smaller.

I don't think bulk data collection was an enormous factor here, because generally, that deals with overseas calls to the United States. But what bulk data collection did was make the process more efficient. So there were no silver bullets there.

We can't be French and Muslim at the same time. And that's exactly what ISIS wants that population to think.

You've got a huge American population, you've got a small, small, small subset that is radicalized, and you have an even smaller subset that actually takes action. And you can't cover everyone who has some contact, someone bad. What you need is offense overseas, defense at home with intelligence and law enforcement, and really deep engagement with these communities.