Iranian Foreign Minister Mohammad Javad Zarif (R, Front) addresses a UN Security Council ministerial debate on the cooperation between the United Nations and regional and subregional organizations in maintaining international peace and security, at the UN headquarters in New York, on Sept. 25, 2019. UN Secretary-General Antonio Guterres warned Wednesday that a "new frontier" of the fight against terrorism is the cyber realm and called for complementing security measures with prevention efforts that identify and address root causes. (Xinhua/Li Muzi)