President Obama meets with Iraqi Prime Minister Haider al-Abadi at the U.N.

President Barack Obama meets with Iraqi Prime Minister Haider al-Abadi following the Leaders' Summit on Countering ISIL and Countering Violent Extremism, at the United Nations in New York, N.Y., Sept. 29, 2015. (Official White House Photo by Pete Souza)

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• September 2015: Photo of the Day