Mohammed M. Hafez

Mohammed Hafez, author of Suicide Bombers in Iraq: The Strategy and Ideology of Martyrdom, says the overwhelming majority of suicide bombers in Iraq are non-Iraqi volunteers. He says the war has unleashed a new generation of Muslim militants who care little about national boundaries. They're driven instead, he says, by the ideal of defending Muslims whoever and wherever they are.

Hafez is a visiting professor of political science at the University of Missouri in Kansas City. He's also the author of Manufacturing Human Bombs: The Making of Palestinian Suicide Bombers.