Iraq

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Iraq's besieged military was supposed to be flying front-line American F-16 fighters by now, joining other Arab forces in a daily air war against the Islamic State terrorist army controlling western and northern Iraq. But while the war rages, there is no firm F-16 arrival date. (Associated Press)

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Nazhan Sakher, left, smokes a cigarette in the bedroom of the base on the frontline outside the city of Makhmour, northern Iraq, during a break in this Monday, April 20, 2015 photo. He leads a group of around 300 fighters from the al-Lehib tribe who have reluctantly allied with Iraqi troops and Kurdish forces to fight the Islamic State group — and fellow tribesmen who still support the extremists. (AP Photo/Bram Janssen)

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Displaced people from Ramadi cross the Bzebiz bridge heading towards Ramadi as they return to their homes, in Ramadi, 65 km west of Baghdad, Iraq, Tuesday, April 21, 2015. A United Nations humanitarian agency says more than 90,000 people have fled the Islamic State group's advance in Iraq's western Anbar province, which has set off fierce fighting in and around the provincial capital Ramadi. (AP Photo/Hadi Mizban)

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Islamic State militants raise their flag as they patrol in a commandeered Iraqi military vehicle in Fallujah, Iraq. (Associated Press)

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In this image made with a mobile phone, Iraqi security forces and tribal fighters gather for a patrol in central Ramadi, Iraq, early Friday, April 17, 2015. In Iraq's western Anbar province, Iraqi special forces maintained control of the provincial capital, Ramadi, after days of intense clashes with the Islamic State group left the city at risk. Sabah Nuaman, a special forces commander in Anbar, said the situation had improved early Friday after airstrikes hit key militant targets on the city's fringes. (AP Photo)

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Vice President Joe Biden talks with Iraq's Prime Minister Haider Al-Abadi during a session of the U.S.-Iraq Higher Coordinating Committee, Thursday, April 16, 2015, in the Indian Treaty Room of the Eisenhower Executive Office Building on the White House complex in Washington. (AP Photo/Susan Walsh) ** FILE **

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Iraqi Prime Minister Haider al-Abadi, right, holds a press conference before leaving to the United States at Baghdad airport, Iraq, Monday, April 13, 2015. (AP Photo/Khalid Mohammed)

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Iraqi Prime Minister Haider al-Abadi arrived last week to distribute weapons and support security forces and Sunni volunteers at a camp in Habaniyah, west of Baghdad. After victory against Islamic State militants in the city of Tikrit, Iraq set sights on western Anbar province for its second major counteroffensive against the Islamic State. (Associated Press)

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Vice President Joe Biden speaks about U.S. policy in Iraq, Thursday, April 9, 2015, at the National Defense University in Washington, in advance of Iraqi Prime Minister Haider al-Abadi’s visit to Washington, next week. The vice president was to discuss Iraq’s political and military progress, and the work that lies ahead to defeat ISIL and forge a more inclusive Iraq. (AP Photo/Jacquelyn Martin)

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Vice President Joe Biden speaks about U.S. policy in Iraq, Thursday, April 9, 2015, at the National Defense University in Washington, in advance of Iraqi Prime Minister Haider al-Abadi’s visit to Washington, next week. The vice president was to discuss Iraq’s political and military progress, and the work that lies ahead to defeat ISIL and forge a more inclusive Iraq. (AP Photo/Jacquelyn Martin)

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Iraqi security forces and allied Shiite militiamen celebrate March 31, 2015, as they hold a flag of the Islamic State group they captured in Tikrit, 80 miles (130 kilometers) north of Baghdad, Iraq. Iraqi forces battled Islamic State militants holed up in downtown Tikrit, going house to house Tuesday in search of snipers and booby traps, and the prime minister said security forces had reached the heart of the city. (Associated Press) **FILE**

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In this Thursday, April 2, 2015 photo, Archbishop for northern Iraq, Saliba Shimon, leads a ceremony at the Mar Matti monastery outside the town of Bashiqa in northern Iraq. (AP Photo/Bram Janssen)

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Shiite clerics inspect one of Saddam Hussein's palaces in Tikrit, 80 miles (130 kilometers) north of Baghdad, Iraq, Thursday, April 2, 2015, a day after Iraqi security forces backed by Shiite militiamen took control of the city from Islamic State militants. (AP Photo/Khalid Mohammed)

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Iraqi Prime Minister Haider al-Abadi tours the city of Tikrit after it was retaken by the security forces in Baghdad, Iraq, Wednesday, April 1, 2015. Iraq declared a "magnificent victory" over the Islamic State group in Tikrit, a key step in driving the militants out of their biggest strongholds. (AP Photo)

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Soldiers from 4th Battalion, 23rd Infantry Regiment, 172nd Stryker Brigade Combat Team exit a UH-60 Black Hawk helicopter near Tall Afar, Iraq, July 2, 2006. (U.S. Air Force) ** FILE **

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Imam Ali Brigades, members of of an Iraqi Shiite militant group, launch rockets against Islamic State extremist positions during clashes in Tikrit, 130 kilometers (80 miles) north of Baghdad, Iraq, Tuesday, March 24, 2015. (AP Photo/Khalid Mohammed)

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In this Saturday, March 21, 2015, a volunteer fighter with a Shiite militant group known as 'Jihad Brigades,' aims his weapon during clashes with Islamic State group militants, outside Tikrit, 130 kilometers (80 miles) north of Baghdad, Iraq. (AP Photo)