- Russians are the largest group of foot soldiers in the group from a non-Muslim majority country, write Peter Bergen and David Sterman
- The news that Istanbul bombers were from former Soviet Union shouldn't be a surprise, they say
Peter Bergen is CNN's national security analyst, a vice president at New America and a professor of practice at Arizona State University. He is the author of the new book "United States of Jihad: Investigating America's Homegrown Terrorists." David Sterman is a senior program associate at New America's International Security Program and holds a master's degree from Georgetown University's Center for Security Studies.
(CNN)The news that the Istanbul attack was carried out by a Russian and citizens of Central Asian states that were once part of the Soviet Union might surprise those who have hitherto seen the group as a collection of mostly Arab fighters with a large Western European contingent.