An Iraqi man celebrates on top of a burning U.S. Army Humvee in the northern part of Baghdad, Iraq, on Monday, April 26, 2004.

U.S. Secretary of State Colin Powell holds up a vial that he said could contain anthrax during a meeting of the United Nations Security Council at the United Nations headquarters on Feb. 5, 2003.

An Iraqi man looks at his mother in a bus as others load luggage on the top of the vehicle bound for neighboring Syria at a bus station in Baghdad, Iraq on March 9, 2003. Bus lines increased their trips to Syria from four to 20 a day at this station, carrying passengers fleeing amid the threat of a US-led invasion as well as others headed to the holy Shiite Muslim shrine of Sayeda Zeinab in the Syrian capital.

Smoke rises from the Trade Ministry in Baghdad on March 20, 2003, after it was hit by a missile during US-led forces attacks.

Saddam Hussein, left, on Iraqi television on March 20, 2003; President Bush addresses the nation from the Oval Office at the White House on March 19, 2003.

A looter rests on a fountain in the lobby of a smoke filled Sheraton hotel in Basra, Iraq, on April 7, 2003. People ransacked the burning hotel after rocket propelled grenades struck the building according to British forces.

People carry an injured man from a damaged building after a car bomb exploded in central Baghdad, Iraq on Monday, killing at least 10 people, including three foreigners working to rebuild Iraq's power plants.

Iraqi soldiers wave as a U.N. weapons inspector vehicle leaves the Al Taje military camp, 30 kilometers outside of Baghdad, after helping to carry out the destruction of four Al-Samoud 2 missiles on March 1, 2003.

Lt. Col. Garry Bush, in charge of the munitions demolition project, watches smoke after a planned explosion of 24 tons of munitions in a storage site next to the village of Aswalim, Iraq, about 100 kilometers southeast of Baghdad, on June 10, 2007.

Flames erupt from a building hit with a TOW missile launched by soldiers of the Armyís 101st Airborne Division (Air Assault) in Mosul, Iraq, on July 21, 2003. Saddam Hussein's sons Qusay and Uday were killed in a gun battle as they resisted efforts by coalition forces to apprehend and detain them.

A suspected al-Qaida member is detained in an Iraqi SWAT raid in Latifiyah, Iraq, on March 16, 2013. An al-Qaida-affiliated group in Iraq claimed responsibility for a carefully planned assault on the Justice Ministry in downtown Baghdad the previous week, less than a week before the 10th anniversary of the U.S.-led invasion of Iraq, showing how vulnerable the country remains to insurgent attacks.

U.S. President George W. Bush, left, speaks with Spanish Prime Minster Jose Maria Aznar by telephone from the Oval Office of the White House in Washington with National Security Adviser Condoleezza Rice at right on March 10, 2003. Bush and his top aides engaged in last-minute telephone diplomacy to world leaders in an uphill struggle to gain support for a U.N. resolution setting up war against Iraq.

U.S. Marines with 3rd Battalion, 7th Marines, 1st Marine Division, take cover after a mortar attack during a sandstorm on a road south of Baghdad, Iraq on March 26, 2003.

Ryan Lamke of Washington, sits by the grave of his fellow U.S. Marine, Cpl. Benny G. Cockerham III, in Section 60 of Arlington National Cemetery on March 19, 2013, in Arlington, Va. Lamke visits his friends grave about once a month. Capt. Tyler Swisher, Navy Petty Officer 3rd Class Chris Thompson, and Marine Lance Cpl. Kenneth Butler also died with Cocherham when their Humvee was attacked by an improvised explosive device.

U.S. Marines play football in Karabilah, Iraq, near the Syrian border, on Nov. 24, 2005, during Thanksgiving celebrations.

U.S. President George W. Bush gives a thumbs up as he visits the aircraft carrier USS Abraham Lincoln off the California coast on Thursday, May 1, 2003. Later in the day, he declared that major combat in Iraq was finished.

A U.S. soldier demonstrates access to a shaft used by former Iraqi leader Saddam Hussein before he was captured two days earlier, on a farm near Tikrit, northern Iraq on Dec. 15, 2003.

Muntadhar al-Zeidi, an Iraqi journalist, throws a shoe at U.S. President George W. Bush during a Dec. 14, 2008, news conference with Iraq Prime Minister Nouri al-Maliki in Baghdad, Iraq. Al-Zeidi was discharged from prison on Sept. 14, 2009, after getting early release for good behavior.

U.S. Army soldiers from 2nd Brigade, 10th Mountain Division are seated aboard a C-17 aircraft at Baghdad International Airport en route back to the United States on July 13, 2010. The soldiers, based at Fort Drum, N.Y., were headed home after nine months in Iraq as part of the U.S. drawdown of forces.

Flowers and a happy birthday balloon are placed at the tombstone of Army Sgt. Dale Brehm in Section 60 of Arlington National Cemetery on March 19, 2013, in Arlington, Va. Brehm died during the Iraq war.

Captured former Iraqi leader Saddam Hussein undergoes a medical examination in Baghdad on Dec. 14, 2003, in this image made from video.