THE ENEMY WITH MANY FACES

Driven by jihadis loyal to al-Zarqawi, the insurgency in Iraq is becoming more confident--and more deadly. But splits in the rebels' ranks are beginning to show

THE GRENADE WAS VISIBLE WHEN THE INSURGENT STEPPED IN FRONT of our car. His sinewy arm was cocked, ready to throw. Fifteen more men poured out from the corner of a nearby tenement, swirling about the car like angry floodwaters. They brandished grenades and AK-47s, pistol grips nudging out from under the folds of their shirts. Spotting me in the backseat, they went into a frenzy, yanking on the handles of the doors, thumping the window with the grenades. Across Iraq, the insurgents have gone on a kidnapping spree, seizing Italian aid workers, French journalists and American construction workers. As they...