MOSUL, IRAQ - AUGUST 19: Iraqi army forces and Peshmerga  forces take security precautions against possible Islamic State (IS)-led terrorist groups' attacks with heavy weapons and armoured vehicles around the Mosul Dam on August 19, 2014 in Mosul, Iraq. IS-led militants had seized the control of the dam and they were driven after the U.S. airstrikes and ground offensive of Iraqi troops. (Photo by Sivan Siddik/Anadolu Agency/Getty Images)