Mon Jul 28, 8:06 AM ET

A U.S. soldier stands guard near an army Humvee leaking a pool of diesel fuel and blood at the scene of a grenade attack in Iraqi capital Baghdad on July 28, 2003. A grenade attack in downtown Baghdad Monday wounded and may have killed two U.S. soldiers in broad daylight, the latest in an increasingly bold and deadly guerrilla campaign. (Oleg Popov/Reuters)