http://www.nytimes.com/2011/12/25/world/middleeast/us-loses-leverage-in-iraq-now-that-troops-are-out.html?_r=1
U.S. Embraces Low-Key Plan as Turmoil in Iraq Deepens
WASHINGTON — As Iraq erupted in recent days, Vice President Joseph R. Biden Jr. was in constant phone contact with the leaders of the country’s dueling sects. He called the Shiite prime minister and the Sunni speaker of the Parliament on Tuesday, and the Kurdish leader on Thursday, urging them to try to resolve the political crisis.
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Iraq tightened security measures on Saturday at the entrance to a Christian church in Baghdad.
And for the United States, that is where the American intervention in Iraq officially stops.
Sectarian violence and political turmoil in Iraq escalated within days of the United States military’s withdrawal, but officials said in interviews that President Obama had no intention of sending troops back into the country, even if it devolved into civil war.