200,000 ISIS tweets a day, 1,000 investigations in all 50 states. It's really hard to stop all of it. But we have to get control over this Internet propaganda that is poisoning the minds of the United States.

What I'm concerned about are two things. I think one that John Miller talked about, and that's the radicalization over the Internet that ISIS is very adept at doing. The other one is a foreign fighter threat.

The phenomena here is the foreign fighter threat, the revolving door from Europe to the region in Iraq and Syria and back through Turkey, back into Europe. And that's what happened in the Paris attackers.

Michael McCaul Quotes