Terrorist groups can never change their stripes, or so politicians regularly remind their citizens. Yet history begs to differ.

This publication is now archived. What’s the status of Iraq’s various militia groups?Despite repeated U.S. requests for them to disband, Iraq’s various ethnic and sectarian militias continue to exist…

This publication is now archived. IntroductionThere is a growing chorus of complaints from Sunni Arab leaders that the Iraqi Security Forces (ISF) has been infiltrated by Shiite militias that engage …

A decade after 9/11, U.S. Muslims grapple with their place in American society in the face of concerns about homegrown terrorism and questions by non-Muslims over the threat they might pose.

An overview of ground transportation systems and their vulnerability to terrorist attacks.