A U.S. Army soldier guards the remains of a burned-out military ammunition truck after it was attacked in Fallujah, Iraq, on Oct. 19, 2003. Fallujah and its surrounds were the site of some of the bloodiest fighting for U.S. troops during the Iraq war. Khalid Mohammed/AP hide caption

itoggle caption Khalid Mohammed/AP

Sunni Muslim fighters in the western Iraqi city of Fallujah take up positions on Sunday. The insurgents have been fighting government troops in battles similar to those a decade ago in the area. Mohammed Jalil/EPA /Landov hide caption

itoggle caption Mohammed Jalil/EPA /Landov

An Iraqi riot police officer flashes the V-sign as his unit returns to its headquarters from clashes with al-Qaida fighters in Basra, Iraq's second-largest city, in the restive Anbar Province. Nabil al-Jurani/AP hide caption

itoggle caption Nabil al-Jurani/AP

In Fallujah on Saturday, Sunni fighters turned out for the funeral of a man killed by Iraqi army artillery fire. Mohammed Jalil /EPA/LANDOV hide caption

itoggle caption Mohammed Jalil /EPA/LANDOV