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An Iraqi nun, right, speaks on her cellphone as she visits displaced families who fled from Christian villages near Mosul province in Iraq, at a school which turned as a shelter for the displaced Christian families, in Ainkawa, a suburb of Irbil, with a majority Christian population, Iraq, Friday, June 27, 2014. Around 2,000 Christians had entered the Kurdish city of Irbil by Thursday morning, June 26. A Christian official there said the Kurdish region is the only part of Iraq where Christians are protected from violence. (AP Photo/Hussein Malla) ( ADDITION Mideast Iraq )

A displaced Iraqi Christian displaced boy who fled from the Christian village of Hamdania near Mosul province in Iraq lies on mattresses where he settled with his family at a temporary shelter for the displaced Christian families, in Ainkawa, a suburb of Irbil, with a majority Christian population, Iraq, Friday, June 27, 2014. Around 2,000 Christians had entered the Kurdish city of Irbil by Thursday morning, June 26. A Christian official there said the Kurdish region is the only part of Iraq where Christians are protected from violence. (AP Photo/Hussein Malla) ( ADDITION Mideast Iraq )

ERBIL, IRAQ - JUNE 27: An Iraqi Christian family live in a tent at a displacement camp for Christians after having to flee their district on June 26, 2014 in Erbil, Iraq. Tens of thousands of people have fled Iraq's second largest city of Mosul after it was overrun by ISIS (Islamic State of Iraq and Syria) militants. Many have been temporarily housed at various IDP camps around the region including the area close to Erbil, as they hope to enter the safety of the nearby Kurdish region. Christians, Shiites and Kurdish Iraqis have received the brunt of the violence from the militants. (Photo by Spencer Platt/Getty Images) ( 451328216 )

ARBIL, IRAQ - JUNE 27: An elderly Iraqi Christian couple sleep on the floor at Saint Joseph's church where they are living with hundreds of other Christians after having to flee their district on June 26, 2014 in Erbil, Iraq. Tens of thousands of people have fled Iraq's second largest city of Mosul after it was overrun by ISIS (Islamic State of Iraq and Syria) militants. Many have been temporarily housed at various IDP camps around the region including the area close to Erbil, as they hope to enter the safety of the nearby Kurdish region. Christians, Shiites and Kurdish Iraqis have received the brunt of the violence from the militants. (Photo by Spencer Platt/Getty Images) ( 451328210 )

ARBIL, IRAQ - JUNE 27: A displaced Iraqi Christian displays a tattoo of Christ on the Cross at Saint Joseph's church where he is living with hundreds of other Christians after having to flee their district on June 26, 2014 in Erbil, Iraq. Tens of thousands of people have fled Iraq's second largest city of Mosul after it was overrun by ISIS (Islamic State of Iraq and Syria) militants. Many have been temporarily housed at various IDP camps around the region including the area close to Erbil, as they hope to enter the safety of the nearby Kurdish region. Christians, Shiites and Kurdish Iraqis have received the brunt of the violence from the militants. (Photo by Spencer Platt/Getty Images) ( 451328198 )

A displaced Iraqi Christian man who fled from the Christian village of Hamdania near Mosul province in Iraq, lies on a mattress where he settled with his family at a church hall that turned for the displaced Christian families, in Ainkawa, a suburb of Irbil, with a majority Christian population, Iraq, Friday, June 27, 2014. TAround 2,000 Christians had entered the Kurdish city of Irbil by Thursday morning, June 26. A Christian official there said the Kurdish region is the only part of Iraq where Christians are protected from violence. (AP Photo/Hussein Malla) ( ADDITION Mideast Iraq )

Displaced Iraqi Christian families who fled from the Christian village of Hamdania near Mosul province in Iraq, sit at a temporary shelter for the displaced Christian families, in Ainkawa, a suburb of Irbil, with a majority Christian population, Iraq, Friday, June 27, 2014. Around 2,000 Christians had entered the Kurdish city of Irbil by Thursday morning, June 26. A Christian official there said the Kurdish region is the only part of Iraq where Christians are protected from violence. (AP Photo/Hussein Malla) ( ADDITION Mideast Iraq )

Displaced Iraqi Christian women who fled from the Christian village of Hamdania near Mosul province in Iraq, walk by a plastic pool to be used with bricks of ice to cool water bottles, at a kitchen where she settled with her family at a church hall that turned for the displaced Christian families, in Ainkawa, a suburb of Irbil, with a majority Christian population, Iraq, Friday, June 27, 2014. Around 2,000 Christians had entered the Kurdish city of Irbil by Thursday morning, June 26. A Christian official there said the Kurdish region is the only part of Iraq where Christians are protected from violence. (AP Photo/Hussein Malla) ( ADDITION Mideast Iraq )

ERBIL, IRAQ - JUNE 27: An Iraqi Christian family walk through Saint Joseph's church where they are living with hundreds of other Christians after having to flee their district on June 26, 2014 in Erbil, Iraq. Tens of thousands of people have fled Iraq's second largest city of Mosul after it was overrun by ISIS (Islamic State of Iraq and Syria) militants. Many have been temporarily housed at various IDP camps around the region including the area close to Erbil, as they hope to enter the safety of the nearby Kurdish region. Christians, Shiites and Kurdish Iraqis have received the brunt of the violence from the militants. (Photo by Spencer Platt/Getty Images) ( 451328220 )

ERBIL, IRAQ - JUNE 27: A displaced Iraqi Christian plays soccer in the courtyard of Saint Joseph's church after having to flee his district with hundreds of others on June 26, 2014 in Erbil, Iraq.Tens of thousands of people have fled Iraq's second largest city of Mosul after it was overrun by ISIS (Islamic State of Iraq and Syria) militants. Many have been temporarily housed at various IDP camps around the region including the area close to Erbil, as they hope to enter the safety of the nearby Kurdish region. Christians, Shiites and Kurdish Iraqis have received the brunt of the violence from the militants. (Photo by Spencer Platt/Getty Images) ( 451332860 )

ERBIL, IRAQ - JUNE 27: An Iraqi Christian family live in a tent at a displacement camp for Christians after having to flee their district on June 26, 2014 in Erbil, Iraq.Tens of thousands of people have fled Iraq's second largest city of Mosul after it was overrun by ISIS (Islamic State of Iraq and Syria) militants. Many have been temporarily housed at various IDP camps around the region including the area close to Erbil, as they hope to enter the safety of the nearby Kurdish region. Christians, Shiites and Kurdish Iraqis have received the brunt of the violence from the militants. (Photo by Spencer Platt/Getty Images) ( 451330880 )

A displaced Iraqi Christian boy who fled from the Christian village of Hamdania near Mosul province in Iraq, sits on a pile of mattress where he settled with his family at a church hall that turned for the displaced Christian families, in Ainkawa, a suburb of Irbil, with a majority Christian population, Iraq, Friday, June 27, 2014. Around 2,000 Christians had entered the Kurdish city of Irbil by Thursday morning, June 26. A Christian official there said the Kurdish region is the only part of Iraq where Christians are protected from violence. (AP Photo/Hussein Malla) ( ADDITION Mideast Iraq )

TOPSHOTS An Iraqi Christian woman fleeing the violence in the village of Qaraqush and Bartala, about 30 kms east of the northern province of Nineveh, kisses the head of a statue representing a Christian saint at a community center in the Kurdish city of Arbil in Iraq's autonomous Kurdistan region, on June 27, 2014. Iraq's top Shiite cleric urged the country's fractious political leaders to unite and form a government to help see off advances by Sunni militants who have overrun swathes of territory. KARIM SAHIB/AFP/Getty Images ( 531142833 )

An Iraqi nun, left, speaks with a Christian man who fled with his family from Christian villages near Mosul province in Iraq, at a school which turned as a shelter for the displaced Christian families, in Ainkawa, a suburb of Irbil, with a majority Christian population, Iraq, Friday, June 27, 2014. Around 2,000 Christians had entered the Kurdish city of Irbil by Thursday morning, June 26. A Christian official there said the Kurdish region is the only part of Iraq where Christians are protected from violence. (AP Photo/Hussein Malla) ( ADDITION Mideast Iraq )

ERBIL, IRAQ - JUNE 27: An Iraqi Christian family live in a tent at a displacement camp for Christians after having to flee their district on June 26, 2014 in Erbil, Iraq.Tens of thousands of people have fled Iraq's second largest city of Mosul after it was overrun by ISIS (Islamic State of Iraq and Syria) militants. Many have been temporarily housed at various IDP camps around the region including the area close to Erbil, as they hope to enter the safety of the nearby Kurdish region. Christians, Shiites and Kurdish Iraqis have received the brunt of the violence from the militants. (Photo by Spencer Platt/Getty Images) ( 451330636 )

ARBIL, IRAQ - JUNE 27: An Iraqi Christian girl rests at Saint Joseph's church where she is living with hundreds of other Christians after having to flee their district on June 26, 2014 in Erbil, Iraq. Tens of thousands of people have fled Iraq's second largest city of Mosul after it was overrun by ISIS (Islamic State of Iraq and Syria) militants. Many have been temporarily housed at various IDP camps around the region including the area close to Erbil, as they hope to enter the safety of the nearby Kurdish region. Christians, Shiites and Kurdish Iraqis have received the brunt of the violence from the militants. (Photo by Spencer Platt/Getty Images) ( 451328202 )