The Eleventh Review Conference of the Parties to the Treaty on the Non-Proliferation of Nuclear Weapons (NPT) was held at the United Nations in New York from 27 April to 22 May 2026. The NPT is a landmark international treaty whose objective is to prevent the spread of nuclear weapons, further the goals of nuclear disarmament and general and complete disarmament, and to promote co-operation in the peaceful uses of nuclear energy. It represents the only legally binding commitment in a multilateral treaty to the goal of disarmament by the nuclear-weapon States. Opened for signature in 1968, the Treaty entered into force in 1970. Since then, the NPT has remained the cornerstone of the global nuclear non-proliferation regime. 191 States parties have joined the Treaty, including the five nuclear-weapon States, making the NPT one of the most widely adhered-to multilateral disarmament agreements.Rafael Mariano Grossi, candidate for the position of the next Secretary-General, briefs reporters after the informal dialogue held with the candidates for the position of the next Secretary-General.Proclaimed in 2011 by UNESCO and endorsed by the United Nations General Assembly in 2012, World Radio Day marks the day United Nations Radio was established in 1946. Radio is a powerful medium for celebrating humanity in all its diversity and constitutes a platform for democratic discourse. At the global level, radio remains the most widely consumed medium. An audio patch bay with voltage control meters used to monitor audio levels.Annalena Baerbock, President of the 80th Session of the United Nations General Assembly, briefs reporters ahead of the start of the informal dialogues with a candidates for the position of the next Secretary-General. The first dialogue is with Michelle Bachelet Jeria from Chile.Secretary-General António Guterres addresses the Security Council high-level debate on the safety of global waterways, amid growing concerns over threats to shipping and freedom of navigation. The Secretary-General said the high seas must be a “zone of peace and cooperation – not confrontation or coercion.”Abdullatif bin Rashid Al Zayani, Minister for Foreign Affairs of the Kingdom of Bahrain and President of the Security Council for the month of April, briefs reporters after the Security Council meeting on the situation in the Middle East. The Security Council voted on a draft resolution by several Gulf States that intended to strongly encourage countries to coordinate defensive efforts and deter attempts to interfere with international navigation through the Strait of Hormuz. The draft resolution was not adopted due to vetoes by Russian Federation and China.Peacekeepers from China serving with the United Nations Mission in South Sudan (UNMISS) patrol Terekeka village and the nearby Joarkwes site in South Sudan. A group of women by the water pump pose for a photo.South Sudanese returnees arrive in Juba in their newly-independent country, after many years of displacement during conflict. They are among 3,200 of their co-nationals who were received in Juba’s river port by the International Organization for Migration (IOM) and Relief and Rehabilitation Commissioner Duer Tut Duer Makuach.A view of a participant at the Permanent Forum on Indigenous Issues (UNPFII), held on the theme: "Ensuring Indigenous Peoples’ health, including in the context of conflict”. The 25st session of the UNPFII is held between 20 April - 1 May.Photo Opportunity in connection with the Commemoration of the abolition of slavery and the transatlantic slave trade. From left to right are Melissa Fleming, Under-Secretary-General for Global Communications, Shahaddah Jack, First Youth Poet Laurate of Toronto, Canada, UN Secretary-General António Guterres, Annalena Baerbock, President of the eightieth session of the United Nations General Assembly, and Esther Phillips, First Poet Laureate of Barbados.A view of a group press briefing led by the Permanent Mission of the Kingdom of Bahrain to the United Nations. The Security Council held a high-level debate on the safety of global waterways, amid growing concerns over threats to shipping and freedom of navigation.A view of the inner dome of the Sheikh-Lut-Allah mosque in Esfahan.An Informal Dialogue with the candidates for the position of the next Secretary-General is held. Michelle Bachelet Jeria from Chile (front), candidate for the position of the next Secretary-General, arrives to take part in the informal dialogue.Secretary-General António Guterres (right) meets King Willem-Alexander of the Netherlands during a visit to the ICJ in The Hague. On the left is Jamal Alrowaiei, Permanent Representative of the Kingdom of Bahrain to the UN and President of the United Nations Security Council for the month of April. The International Court of Justice held a solemn sitting on 17 April in the Great Hall of Justice of the Peace Palace to celebrate the eightieth anniversary of its inaugural session. The session was held under the presidency of Judge Iwasawa Yuji, in the presence of King Willem-Alexander of the Netherlands.A view of Claudia Banz, Director of the Security Council Affairs Division of the Department of Political and Peacebuilding Affairs (DPPA), and a colleague outside of the Security Council Chamber after the Security Council meeting on the situation in the Middle East.A view of Claudia Banz (left), Director of the Security Council Affairs Division of the Department of Political and Peacebuilding Affairs (DPPA), and a colleague in the Security Council Chamber ahead of the Security Council meeting on the situation in the Middle East.An Informal Dialogue with the candidates for the position of the next Secretary-General is held at UN Headquarters. Rebeca Grynspan Mayufis (centre), candidate for the position of the next Secretary-General, arrives to take part in the informal dialogue. At right is Maritza Chan Valverde, Permanent Representative of Costa Rica to the United Nations, and at left is Arnoldo Ricardo André Tinoco, Minister for Foreign Affairs and Worship of Costa Rica.Annalena Baerbock, President of the 80th Session of the United Nations General Assembly speaks at the eightieth anniversary of the ICJ's inaugural session. The International Court of Justice held a solemn sitting on 17 April in the Great Hall of Justice of the Peace Palace to celebrate the eightieth anniversary of its inaugural session. The session was held under the presidency of Judge Iwasawa Yuji, in the presence of King Willem-Alexander of the Netherlands.An Informal Dialogue with the candidates for the position of the next Secretary-General is held at UN Headquarters. Macky Sall from Senegal, candidate for the position of the next Secretary-General, speaks during the informal dialogue.Cows from the local farm in Narrowsburg, New York. International Mother Earth Day is 22 April.

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