Secretary-General Ban Ki-moon (second left); Christiana Figueres (left), Executive Secretary of the UN Framework Convention on Climate Change (UNFCCC); Laurent Fabius (second right), Minister for Foreign Affairs of France and President of the UN Climate Change Conference in Paris (COP21) and François Hollande (right), President of France celebrate after the historic adoption of Paris Agreement on climate change. UN Photo/Mark Garten

Secretary-General Ban Ki-moon, together with Al Gore, former United States Vice President and Chair of the Climate Reality Project, had a joint encounter with civil society representatives and the press during the during the UN Climate Change Conference in Paris (COP21). UN Photo/Mark Garten

A wide view of the Security Council meeting on the Central African region. The Council also considered the report of the Secretary-General on the situation in Central Africa and the activities of the UN Regional Office for Central Africa (UNOCA). UN Photo/Amanda Voisard

A view of the event as Secretary-General Ban Ki-moon (at podium) delivers the keynote address at the Paris Agenda Council Day, hosted by the World Business Council for Sustainable Development (WBCSD). UN Photo/Eskinder Debebe

Secretary-General Ban Ki-moon (second from right) and Anne Hidalgo (left), Mayor of Paris, pay tribute to victims of Bataclan arts centre attack, in Paris, France.UN Photo/Eskinder Debebe

Mosharraf Hossain (in wheelchair, back to camera), Director of Policy and Influencing of the Action on Disability and Development (ADD) International, addresses the special event in observance of the International Day of Persons with Disabilities (3 December). UN Photo/Amanda Voisard

As part of a series of events marking the International Day of Persons with Disabilities (3 December), Heidi Latsky Dance, a New York-based modern dance company, stages in the Visitors Lobby of UN Headquarters a movement installation of 20-30 performers who together form a living gallery. The installation featured different and unexpected bodies in white clothing (signifying all the colours of the rainbow and a metaphor for inclusion), moving as reverent sculptures in the space. UN Photo/Amanda Voisard

Pope Francis during his 29-30 November visit to Bangui, Central African republic. UN Photo/Nektarios Markogiannis

Secretary-General Ban Ki-moon (right) greets Queen Elizabeth II of the United Kingdom during a banquet hosted by the Queen for the 2015 Commonwealth Heads of Government Meeting (CHOGM). UN Photo/Rick Bajornas

An event was held in the Protection of Civilians (POC) Site 3 in Juba, South Sudan to celebrate Universal Children's Day (20 November). UN Police (UNPOL) officers with the Gender, Children and Vulnerable Persons Protection (GVPP) course celebrated and sang songs with children. UN Photo/JC McIlwaine