As Europe reels from the coordinated bombing attacks by terrorists in Belgium, the civilized world continues to face the real challenges of fighting Islamic extremism, whether it be on a battlefield or hiding and festering in a family neighborhood. Here in America, with investigations ongoing into ISIS in all 50 states, this new episode of "War Stories" goes deep inside the confrontation between moderate Muslims and the Islamic State's extremist ideology. How is it really playing out on the battlefields in Iraqi Kurdistan? In an exclusive, the Chairman of the Joint Chiefs of Staff, General Joseph Dunford talks strategy with Oliver North. If boots are needed on the ground, whose feet will be in them? Are our allies doing enough in the fight against ISIS? With former Navy SEAL Leif Babin, we drill down into the "Dark Web" and social media to see how ISIS is leading on the cyber battlefield and what more needs to be done to prevent recruitment of their supporters from around the world. Babin goes inside the ISIS inspired attacks in San Bernardino, California with new details about the trail of the husband and wife terrorists who killed 14 people and wounded 22 others.