Ahmet S. Yayla is an Assistant Professor of Homeland Security at DeSales University. He formerly served as a professor and the chair of the sociology department at Harran University in Turkey, and prior to that as the chief of counterterrorism department of the Turkish National Police in Sanliurfa between 2010 and 2013. He is the co-author of ISIS Defectors: Inside Stories of the Terrorist Caliphate. Follow @ahmetsyayla