United Nations Secretary-General Antonio Guterres (2nd R, Front) addresses a Security Council open debate on "Investing in Peace: Delivering Quality Training and Capacity Building to Improve Safety and Security and Performance of UN Peacekeepers" at the UN headquarters in New York, on May 7, 2019. Guterres said Tuesday that training is a necessary and strategic investment in peacekeeping. (Xinhua/Li Muzi)