Staff Sgt. Daniel Leavindofske and Senior Airman David Babcock help load bundles of halal meals onto a cargo aircraft for a humanitarian mission over Iraq on Saturday. Staff Sgt. Vernon Young Jr./U.S. Air Force via Getty Images hide caption

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Displaced Iraqis wait for aid Friday at a mosque on the outskirts of Irbil in northern Iraq. AP hide caption

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U.S. Military Strikes Sunni Extremist Fighters In Iraq
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People walk on the rubble of the destroyed Mosque of the Prophet Yunus, or Jonah, in Mosul. The revered Muslim shrine was destroyed on Thursday by militants who overran the city in June and imposed their harsh interpretation of Islamic law. Uncredited/AP hide caption

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Video Shows Islamic State Blowing Up Iraq's Tomb Of Jonah
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Against 'Islamic State' Militants, Treasury May Need To Try New Tools
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Iraqi Shiite volunteers with the Labayk ya Hussein Brigade take part in a training session in the holy city of Najaf in late June. Clerics in the city called for Shiites to step forward and fight the Sunni group formerly known as the Islamic State of Iraq and Syria (which now calls itself simply the Islamic State). Haidar Hamdan/AFP/Getty Images hide caption

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In Iraq's Sacred City Of Najaf, Clerics Call On Shiites To Fight
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Iraqi members of the Emergency Response Brigade patrol streets in the western city of Ramadi in Anbar province, where government forces are fighting extremist militants, including a force from the Islamic State of Iraq and Syria. -/AFP/Getty Images hide caption

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Secretary of State John Kerry (second from left) arrives at Irbil International Airport with U.S. Ambassador to Iraq Robert Stephen Beecroft (fourth from left) on Tuesday. The president of Iraq's ethnic Kurdish region declared Tuesday that "we are facing a new reality and a new Iraq." Brendan Smialowski/AP hide caption

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Kerry Visits Kurds To Urge A United Iraq
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Iraqi Prime Minister Nouri al-Maliki (right) sits with Secretary of State John Kerry on Monday. Kerry was in Baghdad to push for Iraqi unity and stability, as Sunni militants swept through western towns abandoned by security forces. Brendan Smialowski/AFP/Getty Images hide caption

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Kerry Meets With Iraqi Prime Minister In Baghdad Amid ISIS Crisis
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President Obama speaks about Iraq in the Brady Briefing room of the White House Thursday. Obama said the U.S. will send up to 300 military advisers to Iraq — but that U.S. forces won't engage in combat with Islamic State in Iraq and Syria (ISIS) militants. Win McNamee/Getty Images hide caption

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Iraqi army soldiers parade during a recruiting drive for men to volunteer for military service in Baghdad on Thursday. The country's leaders are urging Iraqis to help battle insurgents who have mounted an aggressive campaign in the north. Karim Kadim/AP hide caption

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Iraq Battles Militants For Key Oil Refinery In Beiji
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