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

When you do have really tapped out resources that cover so many investigations, it can help you move through and discard some faster.

We're not going to have a perfect batting average and it's important that Americans understand that.

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

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.

ISIS, in some cases like Paris, may actually try to direct. But what it's really trying to do is inspire. So its directed activities are these inspired attacks.

You have the intelligence front and the engagement front. On the intelligence front, the French are better than many of their European counterparts. But they are really challenged in two specific ways.