A destroyed vehicle sits by the side of a road during clashes between Iraqi security forces and militants of the Islamic State in the town of Dalli Abbas in Diyala province
A destroyed vehicle sits by the side of a road during clashes between Iraqi security forces and militants of the Islamic State, formerly known as the Islamic State in Iraq and the Levant (ISIL), in the town of Dalli Abbas in Diyala province July 3, 2014. The al Qaeda splinter group leading the insurgency has declared a medieval-style Islamic caliphate erasing the borders of Iraq and Syria, and threatened to march on the Iraqi capital Baghdad to topple the Shi'ite-led central government. Picture taken July 3, 2014. REUTERS/Stringer (IRAQ - Tags: CIVIL UNREST POLITICS MILITARY)
Iraqi security forces and volunteers carry their weapons during clashes with militants of the Islamic State in the town of Dalli Abbas in Diyala province
Iraqi security forces and volunteers carry their weapons during clashes with militants of the Islamic State, formerly known as the Islamic State in Iraq and the Levant (ISIL), in the town of Dalli Abbas in Diyala province July 3, 2014. The al Qaeda splinter group leading the insurgency has declared a medieval-style Islamic caliphate erasing the borders of Iraq and Syria, and threatened to march on the Iraqi capital Baghdad to topple the Shi'ite-led central government. Picture taken July 3, 2014. REUTERS/Stringer (IRAQ - Tags: CIVIL UNREST POLITICS MILITARY)
Iraqi security forces and armed volunteers move with military vehicles during clashes with militants of the Islamic State in the town of Dalli Abbas in Diyala province
Iraqi security forces and armed volunteers move with military vehicles during clashes with militants of the Islamic State, formerly known as the Islamic State in Iraq and the Levant (ISIL), in the town of Dalli Abbas in Diyala province July 3, 2014. The al Qaeda splinter group leading the insurgency has declared a medieval-style Islamic caliphate erasing the borders of Iraq and Syria, and threatened to march on the Iraqi capital Baghdad to topple the Shi'ite-led central government. Picture taken July 3, 2014. REUTERS/Stringer (IRAQ - Tags: CIVIL UNREST POLITICS MILITARY)
Iraqi security forces and armed volunteers move with military vehicles during clashes with militants of the Islamic State in the town of Dalli Abbas in Diyala province
Iraqi security forces and armed volunteers move with military vehicles during clashes with militants of the Islamic State, formerly known as the Islamic State in Iraq and the Levant (ISIL), in the town of Dalli Abbas in Diyala province July 3, 2014. The al Qaeda splinter group leading the insurgency has declared a medieval-style Islamic caliphate erasing the borders of Iraq and Syria, and threatened to march on the Iraqi capital Baghdad to topple the Shi'ite-led central government. Picture taken July 3, 2014. REUTERS/Stringer (IRAQ - Tags: CIVIL UNREST POLITICS MILITARY)
Iraqi security forces drive military vehicles during clashes with militants of the Islamic State in the town of Dalli Abbas in Diyala province
Iraqi security forces drive military vehicles during clashes with militants of the Islamic State, formerly known as the Islamic State in Iraq and the Levant (ISIL), in the town of Dalli Abbas in Diyala province July 3, 2014. The al Qaeda splinter group leading the insurgency has declared a medieval-style Islamic caliphate erasing the borders of Iraq and Syria, and threatened to march on the Iraqi capital Baghdad to topple the Shi'ite-led central government. Picture taken July 3, 2014. REUTERS/Stringer (IRAQ - Tags: CIVIL UNREST POLITICS MILITARY)
Smoke rises during clashes between Iraqi security forces and militants of the Islamic State in the town of Dalli Abbas in Diyala province
Smoke rises during clashes between Iraqi security forces and militants of the Islamic State, formerly known as the Islamic State in Iraq and the Levant (ISIL), in the town of Dalli Abbas in Diyala province July 3, 2014. The al Qaeda splinter group leading the insurgency has declared a medieval-style Islamic caliphate erasing the borders of Iraq and Syria, and threatened to march on the Iraqi capital Baghdad to topple the Shi'ite-led central government. Picture taken July 3, 2014. REUTERS/Stringer (IRAQ - Tags: CIVIL UNREST POLITICS MILITARY)
Iraqi security forces and volunteers bear arms during clashes with militants of the Islamic State in the town of Dalli Abbas in Diyala province
Iraqi security forces and volunteers bear arms during clashes with militants of the Islamic State, formerly known as the Islamic State in Iraq and the Levant (ISIL), in the town of Dalli Abbas in Diyala province July 3, 2014. The al Qaeda splinter group leading the insurgency has declared a medieval-style Islamic caliphate erasing the borders of Iraq and Syria, and threatened to march on the Iraqi capital Baghdad to topple the Shi'ite-led central government. Picture taken July 3, 2014. REUTERS/Stringer (IRAQ - Tags: CIVIL UNREST POLITICS MILITARY)
Iraqi security forces and volunteers carry their weapons during clashes with militants of the Islamic State in the town of Dalli Abbas in Diyala province
Iraqi security forces and volunteers carry their weapons during clashes with militants of the Islamic State, formerly known as the Islamic State in Iraq and the Levant (ISIL), in the town of Dalli Abbas in Diyala province July 3, 2014. The al Qaeda splinter group leading the insurgency has declared a medieval-style Islamic caliphate erasing the borders of Iraq and Syria, and threatened to march on the Iraqi capital Baghdad to topple the Shi'ite-led central government. Picture taken July 3, 2014. REUTERS/Stringer (IRAQ - Tags: CIVIL UNREST POLITICS MILITARY)
Iraqi security forces and armed volunteers move with military vehicles during clashes with militants of the Islamic State in the town of Dalli Abbas in Diyala province
Iraqi security forces and armed volunteers move with military vehicles during clashes with militants of the Islamic State, formerly known as the Islamic State in Iraq and the Levant (ISIL), in the town of Dalli Abbas in Diyala province July 3, 2014. The al Qaeda splinter group leading the insurgency has declared a medieval-style Islamic caliphate erasing the borders of Iraq and Syria, and threatened to march on the Iraqi capital Baghdad to topple the Shi'ite-led central government. Picture taken July 3, 2014. REUTERS/Stringer (IRAQ - Tags: CIVIL UNREST POLITICS MILITARY)
Iraqi security forces and armed volunteers move with military vehicles during clashes with militants of the Islamic State in the town of Dalli Abbas in Diyala province
Iraqi security forces and armed volunteers move with military vehicles during clashes with militants of the Islamic State, formerly known as the Islamic State in Iraq and the Levant (ISIL), in the town of Dalli Abbas in Diyala province July 3, 2014. The al Qaeda splinter group leading the insurgency has declared a medieval-style Islamic caliphate erasing the borders of Iraq and Syria, and threatened to march on the Iraqi capital Baghdad to topple the Shi'ite-led central government. Picture taken July 3, 2014. REUTERS/Stringer (IRAQ - Tags: CIVIL UNREST POLITICS MILITARY)