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FILE - In this undated file photo posted on Monday, June 30, 2014 by the Raqqa Media Center of the Islamic State group, a militant extremist group, which has been verified and is consistent with other AP reporting, fighters from extremist Islamic State group parade in Raqqa, Syria. In staging airstrikes against Islamic State extremists in Syria, the U.S. may find itself in a confounding morass teeming with jihadis, rebel rivalries and sectarian hatred. (AP Photo/Raqqa Media Center of the Islamic State group, File)
FILE - In this undated file photo posted on Monday, June 30, 2014 by the Raqqa Media Center of the Islamic State group, a militant extremist group, which has been verified and is consistent with other AP reporting, fighters from extremist Islamic State group parade in Raqqa, Syria. In staging airstrikes against Islamic State extremists in Syria, the U.S. may find itself in a confounding morass teeming with jihadis, rebel rivalries and sectarian hatred. (AP Photo/Raqqa Media Center of the Islamic State group, File)

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