(AGI) Cairo, Sept 27 - The U.S.-led fight against Islamic State(IS) militants will not succeed as long as Syrian PresidentBashar al-Assad remains in power, Qatari Emir Sheikh Tamimwarned in an interview with CNN. "We have to counter terrorism,yes. But I believe that the main cause of all this is theregime in Syria. If we think that we're going to fightterrorism and leave that regime alive, the terrorist movementswill come back again," he said. . .