A member of Iraqi government forces holds a national flag next to an armoured vehicle on June 27, 2016 in western Fallujah, 50 kilometres (30 miles) from the Iraqi capital Baghdad, after Iraqi forces retook the embattled city from the Islamic State group. Iraqi forces took the Islamic State group's last positions in the city of Fallujah on June 26, 2016, establishing full control over one of the jihadists' most emblematic bastions after a month-long operation. Haidar Mohammed Ali/AFP/Getty Iraqi government forces patrol a street on June 27, 2016 in western Fallujah, 50 kilometres (30 miles) from the Iraqi capital Baghdad, after Iraqi forces retook the embattled city from the Islamic State group. Iraqi forces took the Islamic State group's last positions in the city of Fallujah on June 26, 2016, establishing full control over one of the jihadists' most emblematic bastions after a month-long operation. Haidar Mohammed Ali/AFP/Getty A member of Iraqi government forces celebrate along a street in Falluja after government forces recaptured the city from Islamic State militants, June 27, 2016. Thaier Al-Sudani/Reuters Iraqi government forces drive their military vehicle in Fallujah after forces retook the embattled city from the Islamic State group on June 26, 2016. Iraqi Prime Minister Haider al-Abadi urged all Iraqis to celebrate the recapture of Fallujah by the security forces and vowed the national flag would be raised in Mosul soon. While the battle has been won, Iraq still faces a major humanitarian crisis in its aftermath, with tens of thousands of people who fled the fighting desperately in need of assistance in the searing summer heat. Haidar Mohammed Ali/AFP/Getty Explosives left behind by Islamic State militants are seen at a school, following clashes in Fallujah, Iraq, June 25, 2016. Thaier Al-Sudani/Reuters Members of the Shi'ite Badr Organisation inspect a factory abandoned by Islamic State militants, in Fallujah, Iraq, June 25, 2016. Thaier Al-Sudani/Reuters A member of Iraqi counterterrorism forces walks with his weapon in Fallujah, Iraq, June 26, 2016. Thaier Al-Sudani/Reuters Armoured vehicles of Iraqi government forces are stationned on a street on June 27, 2016 in western Fallujah, 50 kilometres (30 miles) from the Iraqi capital Baghdad, after Iraqi forces retook the embattled city from the Islamic State group. Iraqi forces took the Islamic State group's last positions in the city of Fallujah on June 26, 2016, establishing full control over one of the jihadists' most emblematic bastions after a month-long operation. Haidar Mohammed Ali/AFP/Getty An unexploded mortar shell is seen half buried in the ground in Fallujah, 50 kilometres (30 miles) from the Iraqi capital Baghdad, after Iraqi forces retook the embattled city from the Islamic State group on June 26, 2016. Iraqi Prime Minister Haider al-Abadi urged all Iraqis to celebrate the recapture of Fallujah by the security forces and vowed the national flag would be raised in Mosul soon. While the battle has been won, Iraq still faces a major humanitarian crisis in its aftermath, with tens of thousands of people who fled the fighting desperately in need of assistance in the searing summer heat. / AFP / HAIDAR MOHAMMED ALI (Photo credit should read HAIDAR MOHAMMED ALI/AFP/Getty Images) Haidar Mohammed Ali/AFP/Getty Iraqi counterterrorism forces sit in a top of a military vehicle in Fallujah, Iraq, June 23, 2016. Thaier Al-Sudani/Reuters A picture taken through a hole on a building shows Fallujah, 50 kilometres (30 miles) from the Iraqi capital Baghdad, after Iraqi forces retook the embattled city from the Islamic State group on June 26, 2016. Iraqi Prime Minister Haider al-Abadi urged all Iraqis to celebrate the recapture of Fallujah by the security forces and vowed the national flag would be raised in Mosul soon. While the battle has been won, Iraq still faces a major humanitarian crisis in its aftermath, with tens of thousands of people who fled the fighting desperately in need of assistance in the searing summer heat. / AFP / HAIDAR MOHAMMED ALI (Photo credit should read HAIDAR MOHAMMED ALI/AFP/Getty Images) Haidar Mohammed Ali/AFP/Getty