U.S. formally shuts down Iraq war

U.S. Army soldiers from the 2-82 Field Artillery, U.S. Army soldiers from the 2-82 Field Artillery, 3rd Brigade, 1st Cavalry Division, one of the last American combat units to leave Iraq, walk toward board buses at Camp Virginia in Kuwait as they begin their journey back home to Fort Hood, Texas. (Dec. 15, 2011) Photo Credit: Getty Images

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BAGHDAD - There was no "Mission Accomplished" banner. No victory parade down the center of this capital scarred and rearranged by nearly nine years of war. No crowds of cheering Iraqis grateful for liberation from Saddam Hussein.

Instead, the U.S. military officially declared an end to its mission in Iraq on Thursday with a businesslike closing ceremony behind blast walls in a fortified compound at Baghdad airport. The flag used by U.S. forces in Iraq was lowered and boxed up in a 45-minute ceremony. No senior Iraqi political figures attended.

With that, and brief words from top American officials who flew in under tight security still necessary because of the ongoing violence in Iraq, the U.S. drew the curtain on a war that left 4,500 Americans and more than 100,000 Iraqis dead.

The conflict also left another 32,000 Americans and far more Iraqis wounded, drained more than $800 billion from America's treasury and soured a majority of Americans on a war many initially supported as a just extension of the fight against terrorism after the 9/11 attacks.

As the last troops withdraw from Iraq, they leave behind a nation free of Saddam's tyranny but fractured by violence and fearful of the future. Bombings and gun battles are still common. And experts are concerned about the Iraqi security forces' ability to defend the nation against foreign threats.