Troy E. Mitchell holds a Doctorate in Strategic Security and serves as a professor at National American University and is an officer in the U.S. Marine Corps. He has taught undergraduate and graduate courses in intelligence and counter-terrorism studies. He writes on issues involving national security, intelligence analysis, and violent extremism. Some of his publications include CTS 1: The Counterterrorism, WMD & Hybrid Threat Smartbook, "The Roots of Violent Extremism," "Yemen at the Crossroads," and "Containing Marawi." Follow Troy on Twitter @TmitchellTroy.