A displaced Iraqi youth from the Yazidi community poses for a picture in the northern Iraqi town of Dohuk on May 20, 2015.  The Yazidis have long been one of the most vulnerable minorities in Iraq and have been particularly targeted by Islamic State jihadists, who have overrun much of the country. The United Nations said the IS may have committed genocide in trying to wipe out the Yazidi minority, in a report laying out a litany of atrocities, detailing killings, torture, rape, sexual slavery and the use of child soldiers by the extremists.   AFP PHOTO / SAFIN HAMED        (Photo credit should read SAFIN HAMED/AFP/Getty Images)