Militants of the Islamic State of Iraq and the Levant (ISIL) jihadist group hold a checkpoint on June 17, 2014 in Iraq’s second city of Mosul. Since ISIL began its spectacular assault in Mosul late on June 9, jihadist fighters have captured a large swathe of northern and north-central Iraq, prompting as many as half a million people to flee their homes. AFP PHOTO/KARIM SAHIB (Photo credit should read KARIM SAHIB/AFP/Getty Images)