Nouri Al-Maliki

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Vice President Joseph R. Biden welcomes Iraqi Prime Minister Nouri al-Maliki to the Naval Observatory. (Associated Press)

Iraq's Prime Minister Nouri al-Maliki listens during a meeting with House Foreign Affairs Committee Chairman Rep. Ed Royce, R-Calif., and the committee's ranking Democrat Rep. Eliot Engel, D-N.Y., Wednesday, Oct. 30, 2013, on Capitol Hill in Washington. (AP Photo/Molly Riley)

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U.S. Secretary of State John F. Kerry (right) meets with Iraqi Prime Minister Nouri al-Maliki in Baghdad on Sunday, March 24, 2013. Mr. Kerry, on an unannounced visit to Iraq, was expected to urge Mr. al-Maliki to make sure Iranian flights over Iraq do not carry arms and fighters to Syria, a U.S. official said. (AP Photo/Jason Reed, Pool)

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Iraq's Prime Minister Nouri al-Maliki (seen here) and ExxonMobil Chairman and CEO Rex Tillerson met Monday in Baghdad, possibly signaling a resolution of the country's dispute with America's largest oil company. (Associated Press)

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Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, and Mr. Petraeus leave a meeting with Iraqi Prime Minister Nouri al-Maliki in Baghdad during a six-day tour in 2008. (Associated Press)

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Iraqi Prime Minister Nouri al-Maliki (center) attends the Arab League summit in Baghdad on Thursday, March, 29, 2012. Only 10 leaders of the 22-member bloc are in attendance. (AP Photo/Karim Kadim)

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Iraqi Prime Minister Nouri al-Maliki (center) attends a meeting of Arab economic, finance and trade ministers as part of the Arab League summit in Baghdad on Tuesday. Economic ministers from across the Arab world are looking at ways to develop tourism and ensure access to increasingly strapped water supplies in the region to boost economic stability in their countries. (Associated Press)