of UN actions in the final battles of the Sri Lankan Civil War in 2009 concluded that the organization had suffered "systemic failure". In 2010, the organization suffered the worst loss of life in its history, when 101 personnel died in the Haiti earthquake. Acting under United Nations Security Council Resolution 1973 in 2011, NATO countries intervened in the First Libyan Civil War. The Millennium Summit was held in 2000 to discuss the UN's role in the 21st century. The three-day meeting was the largest gathering of world leaders in history, and culminated in the adoption by all member states of the Millennium Development Goals (MDGs), a commitment to achieve international development in areas such as poverty reduction, gender equality, and public health. Progress towards these goals, which were to be met by 2015, was ultimately uneven. The 2005 World Summit reaffirmed the UN's focus on promoting development, peacekeeping, human rights, and global security. The Sustainable Development Goals were launched in 2015 to succeed the Millennium Development Goals. In addition to addressing global challenges, the UN has sought to improve its accountability and democratic legitimacy by engaging more with civil society and fostering a global constituency. In an effort to enhance transparency, in 2016 the organization held its first public debate between candidates for secretary-general. On 1 January 2017, Portuguese diplomat António Guterres, who previously served as UN High Commissioner for Refugees, became the ninth secretary-general. Guterres has highlighted several key goals for his administration, including an emphasis on diplomacy for preventing conflicts, more effective peacekeeping efforts, and streamlining the organization to be more responsive and versatile to global needs. Structure The United Nations is part of the broader UN system, which includes an extensive network of institutions and entities. Central to the organisation are five principal organs established by the UN Charter: the General Assembly (UNGA), the Security Council (UNSC), the Economic and Social Council (ECOSOC), the International Court of Justice (ICJ) and the UN Secretariat. A sixth principal organ, the Trusteeship Council, suspended operations on 1 November 1994, upon the independence of Palau, the last remaining UN trustee territory. Four of the five principal organs are located at the main UN Headquarters in New York City, while the ICJ is seated in The Hague. Most other major agencies are based in the UN offices at Geneva, Vienna, and Nairobi; additional UN institutions are located throughout the world. The