Iraqi Shiite militia fighters raise up their weapons as they celebrate pushing back Islamic State (IS) militants on September 3, 2014, on the road between Amerli and Tikrit . Amerli was besieged when IS-led militants launched a major offensive in June, overrunning chunks of five Iraqi provinces and sweeping security forces aside, though security forces have now begun to claw back some ground. AFP PHOTO/ AHMAD AL-RUBAYE        (Photo credit should read AHMAD AL-RUBAYE/AFP/Getty Images)