A U.S. convoy passes by a burning U.S. truck that came under attack on the airport road in Baghdad, Iraq, Thursday, April 15, 2004.
U.S. soldiers conduct a weapons search operation in the Talbiyah district in Baghdad, Iraq, Thursday, April 15, 2004.
Marine Pfc. Robert Thompson, 19, of Helena, Mont., right, and Pfc. Ryan Topete, 20, of Sioux City, Iowa, look over a high-powered sniper rifle that Marines found in the car of a man that was passing by their position in northwest Fallujah on Wednesday, April 14, 2004. The man was detained for questioning.
U.S Army soldiers and Iraqi policemen secure the area outside the Sheraton Hotel, in Baghdad, Iraq, Wednesday, April 14, 2004. A rocket hit the hotel in central Baghdad, where foreign contractors and journalists are staying, breaking glass but causing no casualties. A second rocket failed to explode and remained in the street outside.
A U.S Marine looks for insurgent positions, seconds after coming under fire in Fallujah, Iraq, Wednesday, April 14, 2004.
U.S. armored vehicles take off for a patrol on the outskirts of Najaf, Iraq, Wednesday, April 14, 2004. U.S. troops are now based outside Najaf and are preparing to deploy in the city for a possible assualt to capture radical cleric Muqtada al-Sadr.
A U.S. Marine amphibious assault vehicle moves towards a battle in Fallujah, Iraq, Tuesday, April 13, 2004. Although an official "ceasfire" remains in place, Marines in Fallujah came under intense fire Tuesday and called for reinforcements.
U.S Army soldiers atop of their vehicle stand guard during a patrol along the streets of Baghdad, Iraq, Tuesday, April 13, 2004.
An armed supporter of Muqtada al-Sadr displays his Mahdi army badge as he guards the periphery of the Imam Ali mosque in Najaf, Iraq, Tuesday. April 13, 2004.
An Iraqi man walks towards the charred remains of a U.S. helicopter that was downed, Tuesday, April 13, 2004, outside of Fallujah, Iraq.
Hazem al-Aaraji, center right, who is an aid to Shi'ite cleric Muqtada al-Sadr, is escorted by U.S. soliders towards the Sheraton Hotel in Baghdad Tuesday, April 13, 2004, to be detained and questioned.
A U.S Army soldier stands guard atop his vehicle during an army operation at Al-Mustansiriyah University in Baghdad, Iraq, Monday, April 12, 2004.
U.S. Marines from the 1st Battalion, 5th Marine Regiment, knock in a door while conducting a house-to-house search for weapons and insurgents in Fallujah, Iraq, Monday, April 12, 2004.
Residents watch as U.S. Marines from the 1st Battalion, 5th Marine Regiment, search their house for weapons in Fallujah, Iraq, April 12, 2004.
Iraqis loots a U.S. supply truck after it came under attack on the Baghdad to Fallujah highway, in Baghdad, Iraq, April 12, 2004.
U.S. soldiers patrol the area of an attack on a supply truck on the Baghdad to Fallujah highway, April 12, 2004.
An Iraqi man loots a U.S. supply truck after it came under attack on the Baghdad to Fallujah highway, April 12, 20O4.
U.S. Marines from the 1st Battalion, 5th Marine Regiment, prepare to cross a street during a house to house search for weapons and insurgents in Fallujah, Iraq, April 12, 2004.
A U.S. Army Humvee stands guard next to a burning army vehicle that was attacked by insurgents at the Baghdad-Fallujah highway, April 12, 2004. Gunfire was largely silenced in the second day of a truce in Fallujah, where doctors said 600 Iraqis, including many civilians, were killed in the past week's Marine siege of Sunni insurgents.