J.M. Berger was a nonresident fellow in the Project on U.S. Relations with the Islamic World at Brookings and is the author of "Jihad Joe: Americans Who Go to War in the Name of Islam" (Potomac Books, 2011) and "ISIS: The State of Terror" (Ecco, 2015). An analyst and consultant studying extremism, he is also involved with developing analytical techniques to study political and extremist uses of social media. He is a regular contributor to Foreign Policy and the founder of Intelwire.com.
The global rise of white supremacist terrorism