As we defeat ISIS and diminish their Caliphate, they have begun to disperse like insects with the lights on. Their decentralized network is spreading throughout the world as evidenced by the attacks in Europe, the Middle East - including Iran, and here at home in the U.S. Radical Islamic operatives from ISIS and Al Quaeda are infiltrating Western communities and either radicalizing young people and inspiring them to acts of terror, or as trained operatives, they execute attacks themselves. To be clear, this is an unconventional opponent and it will require an equally asymmetrical response. America, and our allies, must lead a combined arms approach that includes conventional military doctrine, domestic law enforcement, cyber task forces, and embedded foreign intelligence. Terrorists cannot be appeased; they can only be destroyed.