FILE - In this undated file image posted by the Raqqa Media Center, in Islamic State group-held territory, on Wednesday, Aug. 27, 2014, which has been verified and is consistent with other AP reporting, fighters from the Islamic State group pray at the Tabqa air base after capturing it from the Syrian government in Raqqa, Syria. A two-pronged advance to capture key urban strongholds of the Islamic State, and the extremist group's self-styled capital of Raqqa has underlined a convergence of strategy between Washington and Moscow to defeat the extremist group, with Syria's Kurds emerging as the common denominator. (Raqqa Media Center of the Islamic State group via AP, File)
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