The UN invitation for Iran to attend the conference on the crisis in Syria has triggered immediate reactions from the US and Syria\'s foreign-backed opposition. The US State Department says the UN must take back its invitation unless Tehran publicly backs the 2012 agreement on a transition government in Syria. The U-S has been the main party opposed to Iran\'s participation in the conference. Meanwhile, Syria\'s foreign-backed opposition has reportedly said that it will withdraw from the talks now that Iran has been invited. Show Less >>