In this photo released on May 20, 2015, provided by the Kurdish fighters of the People's Protection Units (YPG), which has been authenticated based on its contents and other AP reporting, Kurdish fighters of the YPG, flash victory signs as they sit on their pickup on their way to battle against the Islamic State, near Kezwan mountain, northeast Syria. In contrast to the failures of the Iraqi army, in Syria Kurdish fighters are on the march against the Islamic State group, capturing towns and villages in an oil-rich swath of the country's northeast in recent days, under the cover of U.S.-led airstrikes. (The Kurdish fighters of the People's Protection Units via AP)
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