J.M. Berger is a researcher, analyst and consultant, with a special focus on extremist activities in the United States, and extremist propaganda and use of social media. He is an associate fellow with the International Centre for Counter-Terrorism, The Hague, a fellow with George Washington University's Program on Extremism, and was previously a non-resident fellow with the Brookings Institution. Berger is co-author of ISIS: The State of Terror with Jessica Stern and author of Jihad Joe: Americans Who Go to War in the Name of Islam. Berger has written for the New York Times, Politico, The Atlantic and Foreign Policy. He has served as an on-air consultant for PBS, ABC News and Showtime, and as a producer for NPR.