Syrian President Bashar al-Assad must go, but members of his regime could be invited to join a transitional government that promotes democratic change, dpa quoted British Prime Minister David Cameron as saying Tuesday. Speaking after the G8 summit in Northern Ireland, Cameron said the international community should learn the lessons of Iraq and avoid creating a power vacuum in Syria. "It is unthinkable that Assad can play any role in the future government of his country," Cameron said. However, "we know Syria needs a functioning government."