TO GO WITH AFP STORY BY SERENE ASSIR Kurdistan Workers Party (PKK) fighters guard a post bearing an image of jailed PKK leader Abdullah Ocalan as they fight in an intensive security deployment against Islamic State (IS) militants in the town of Makhmur, southwest Arbil, the capital of the autonomous Kurdish region of northern Iraq, on August 21, 2014. Kurdish groups from Iraq and three neighbouring countries are putting aside old rivalries to battle jihadist militants, but there are cracks in this newly-forged unity and it may not last. AFP/ PHOTO/AHMAD AL-RUBAYE (Photo credit should read AHMAD AL-RUBAYE/AFP/Getty Images)