Who are the insurgents in Iraq and what do they want? What motivates foreign fighters to make their way to Iraq in order to kill fellow Muslims? Why are Saudis flocking to die in Iraq? Why are the Shiites and Iraqi security forces the main targets of suicide bombers in Iraq? Mohammed Hafez, author of a forthcoming book on suicide bombers in Iraq, attempts to answer these and other vexing questions by examining the varied factions that comprise the insurgency, the ideology and theology of martyrdom, and the prospects for a "third generation" of transnational jihadists forged in the crucible of Iraq.