SALADIN, IRAQ - SEPTEMBER 1: Locals celebrate after Iraqi forces have freed the northern town of Amirli which had been under the siege of Islamic State militants for over two months in Saladin ,Iraq on September 1, 2014. Supported by Kurdish forces and Shiite militias, the Iraqi army launched an offensive shortly after the U.S. carried out airstrikes against Islamic State (IS) positions near the town, and dropped aid for the nearly 20,000 Shiite Turkmen trapped in Amirli. The government forces and Kurdish peshmerga forces have been fighting against the militant group to block their advance. (Photo by Stringer/Anadolu Agency/Getty Images)