1/3 Members of the Iraqi government forces hold an Islamic State (IS) group flag upside down as smoke billows from oil wells, set ablaze by IS militants before fleeing the oil-producing region of Qayyarah, Aug 30, 2016, after Iraqi forces pushed the jihadists out of the northern town on the banks of the Tigris river. (SAFIN HAMED / AFP)

2/3 In this undated tv grab taken from a video released by Al-Furqan media, the chief of the Islamic State group Abu Bakr al-Baghdadi purportedly appears for the first time in five years in a propaganda video in an undisclosed location. (AL-FURQAN MEDIA / AFP)

3/3 This still image from video obtained on Oct 26, 2012 courtesy of the Site Intelligence Group shows Al-Qaeda leader Ayman al-Zawahiri speaking in a video, from an undisclosed location, released by Al-Qaeda’s media arm, as-Sahab, and titled "Zawahiri Calls for Continuing Egyptian Revolution, Questions Morsi." (SITE Intelligence Group / AFP)