Researcher: Foreign countries not repatriating their citizens who fought with Islamic State will result in repeated prison breaks.
A member loyal to the Islamic State in Iraq and the Levant (ISIL) waves an ISIL flag in Raqqa June 29, 2014. The offshoot of al Qaeda which has captured swathes of territory in Iraq and Syria has declared itself an Islamic "Caliphate" and called on factions worldwide to pledge their allegiance, a st(photo credit: REUTERS/STRINGER)ByKSENIA SVETLOVA/THE MEDIA LINE
