Free Syrian Army fighters take cover from incoming Syrian Army fire in the Izaa district in Aleppo, Syria, Wednesday, Sept. 12, 2012. (AP/Manu Brabo)

Think Tank: Most Syrian Rebel Groups Ideologically Similar To ISIS

Tony Blair-run group warns 15 major rebel factions could replace ISIS.

Sign Up For The Best Of MintPress, Delivered To Your Daily Inbox.

Sign up for our daily digest.