Europe has been in the eye of a terrorism storm that many say is just beginning. The Islamic State group has launched sophisticated attacks in Paris and Belgium already and is threatening more. Trying to figure out what's next has pushed Europe's intelligence services to extremes they've not been faced with in more than a decade. The man leading the charge for the European Union, Rob Wainwright, breaks down the strategy.

The world has been preoccupied with the size of the so-called Islamic State terror organization since it sprang up in 2014. But, for all of that preoccupation, there has been precious little certainty about just how big ISIL is, who's actually on the ground fighting and how it all impacts U.S. national security. In part two of our exclusive interview, National Counterterrorism Director Nicholas Rasmussen breaks down the composition of ISIL, including participation by Americans.

The growing number of stealthy terrorists roaming the planet are keeping Nicholas Rasmussen, Director of the National Counterterrorism Center, up at night. In part one of an exclusive interview, he says the agency is stretched more "thinly now than they were five or six years ago." He says it's impossible to keep up with every terrorist and outlines the main challenge that ISIL poses in the aftermath of major terror attacks in Europe and the U.S.

The surprise attack by ISIS in Brussels, again stunned the world and demonstrated how hard it is to stop them. As a result, the FBI and other U.S. intelligence officials are redoubling efforts to make sure security is air tight - especially in Washington.

A chilling examination of the North Korean regime and what's at stake for the U.S. Former Ambassador Joseph Detrani sat across the table from North Korea trying to talk the country down from its nuclear program. He tells host J.J. Green why North Korea is such a big threat to the region and the U.S.

Director of National Intelligence Jim Clapper says in an exclusive interview that he is concerned with Russia's renewed aggressiveness toward the U.S. And, he says, the situation is getting more alarming.

Director of National Intelligence Jim Clapper opens up in an exclusive interview about the dark threats and dangerous enemies the U.S. faces. Clapper breaks down in vivid detail the sophisticated nature of the groups and nation-states that want to attack.