1. The Return of Sunni Foreign Fighters in Iraq Author: Aaron Y. Zelin Publication Date: 06-2014 Content Type: Policy Brief Institution: The Washington Institute for Near East Policy Abstract: The Mosul crisis highlights how ISIS has established a potent cadre of foreign jihadists who freely operate across the rapidly disappearing Iraq-Syria border. Topic: Islam, Terrorism, and Armed Struggle Political Geography: Iraq, Middle East, and Syria