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.

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

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 need additional funding for more U.S. combat brigades in Europe. NATO needs to continue to modernize. It is starting to show with the Russians but these exercises are central to show that the alliance is firm, especially as the E.U. starts to have some weakness on the economic front.

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

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.