McCaul: We’re Most Concerned About Americans Who’ve Returned from Syria & Iraq

McCAUL: Well, 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. So, we have 40,000 foreign fighters that have converged into Iraq and Syria from 120 different countries, 6,000 Western passports. Thousands have come back to Europe, but hundreds have left the United States and gone to the region. Many have returned. Those are the suspects that we’re most concerned about in the United States. And then, finally, the idea that there are ISIS followers in the United States talking to ISIS in Raqqa and being influenced by them, and the thing that is the biggest challenge to federal law enforcement is the fact that they are communicating in darkness, what is called encryption. We can’t see what they’re saying. And if you can’t see what they’re saying in advance, it’s very hard to stop it.