Al Qaeda

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The late al Qaeda leader Osama bin Laden (Associated Press) ** FILE **

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In this undated file image posted by the Raqqa Media Center, a Syrian opposition group, on Monday, June 30, 2014, which has been verified and is consistent with other AP reporting, fighters from the al Qaeda-linked Islamic State group parade in Raqqa, Syria. (AP Photo/Raqqa Media Center of the Islamic State group, File)

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This undated file image posted on a militant website on Jan. 14, 2014, which has been verified and is consistent with other AP reporting, shows fighters from the al Qaeda-linked Islamic State of Iraq and the Levant (ISIL) marching in Raqqa, Syria. (AP Photo/Militant Website, File)

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This undated file image posted on a militant website Jan. 14, 2014 shows fighters from the al Qaeda-linked Islamic State of Iraq and the Levant (ISIL) marching through Raqqa, Syria. (AP Photo/Militant Website, File)

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Al-Qaeda-linked Nusra Front militants in Syria, where Husan Dughman fears a familiar pattern: "removal of a hated regime, followed by descent into chaos" and final victory by extremists. (AP Photo/Edlib News Network ENN, File)

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FILE - In this undated file image posted on a militant website on Tuesday, Jan. 14, 2014, which has been verified and is consistent with other AP reporting, fighters from the al-Qaida linked Islamic State group, march in Raqqa, Syria. The Islamic State group will likely take center stage when more than 140 heads of state of government convene for the U.N. General Assembly the week of Sept. 22. (AP Photo/File)

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** FILE ** Abu Bakr al-Baghdadi, leader of the al Qaeda splinter group the Islamic State, has rarely been photographed. (Associated Press)

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Iraqis sign up for military service to help battle an al Qaeda-inspired militant army intent on capturing Baghdad International Airport and eventually the capital itself. (Associated Press)