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Author: Daniel Koehler Michael H. Becker Gordon Clubb Jocelyn J. Bélanger Michael J. Williams a Competence Centre Against Extremism in Baden-Wuerttemberg, Stuttgart, Germanyb Department of Justice, Law, and Criminology, American University, Washington, DC, USAc University of Leeds; Leeds, United Kingdomd Carnegie Mellon University Qatar, Al Rayyan, Qatare Founding Director of The Science of P/CVE, Atlanta, USA