The head of ISIS called for attacks during the season of Ramadan, which is what you have seen both in Orlando and now in Istanbul at the airport.

Now we're dealing with a younger generation of terrorists that are very, very savvy with computer skills, very savvy over the Internet, and very savvy with social media of the likes that we have never seen before.

I was in Cairo, Egypt, where Sinai - ISIS conducted the Russian airliner downing. We're concerned about safety and security at these last point-of-departure airports flying directly into the United States - in that case, JFK.

I think it's important to note that after the airstrikes began in Iraq and Syria, ISIS began a very aggressive social media campaign calling for these types of attacks, these lone wolf attacks.

We pulled out of Libya. Now look what's happened: a safe haven, a vacuum, ISIS training militants to hit in Tunisia.

I think Syria is now the training ground for the world... These rebel forces are more of a threat than anything.