sentences:  The US occupation and ethnic conflict among Iraqis ended the minority Sunni governance and allowed the Shi’ite majority to regain control, which worried Iraq’s Sunni majority neighbors, including Saudi Arabia.Terrorist organizations like Al Qaeda have taken advantage of the chaos and violence to establish a presence in Iraq.By February 16, 2007, António Guterres, the United Nations High Commissioner for Refugees, said that the external refugee number fleeing the war reached 2 million and that within Iraq there are an estimated 1.7 million internally displaced people.