Leaders of some of the world's biggest AI companies urged caution at the United Nations on Wednesday, warning that increasingly autonomous systems could outpace human oversight. Anthropic CEO Dario Amodei pledged to slow development to ensure new AI systems are safe, while OpenAI chief Sam Altman called for "extreme care".

A former British member of parliament implied that a video filmed from a helicopter on September 11, 2001 shows that no planes actually hit the World Trade Center's south tower, but this claim would be unfounded. The plane that hit the south tower hit the other side of the building, which isn’t visible in the video.

Disgraced movie mogul Harvey Weinstein was sentenced to 15 years in prison Wednesday in another #MeToo reckoning for sexually assaulting a former production assistant in 2006.

The current moment in artificial intelligence development "calls for extreme care", OpenAI CEO Sam Altman told an emergency session of the UN Security Council on Wednesday following weeks of global headlines about the risk of uncontrollable AI. Read our live blog to see how the day's events unfolded.

UN Secretary-General Antonio Guterres pleaded for “a world built on interdependence” Tuesday as he made his final address to the annual gathering of world leaders convening to face a formidable menu of challenges, from climate change and war to inequality and the rise of artificial intelligence. 

US President Donald Trump launched a full-throated defence of the deeply unpopular US-Israeli war against Iran before the UN General Assembly on Tuesday, claiming that Washington would reach a deal with Tehran after the upcoming US midterm elections. Trump also rejected the idea of global regulation of artificial intelligence, said the government of Cuba would soon "fall", and urged member countries of the International Criminal Court to "resign". 

The top five US television networks staged a revolt on Monday when they effectively boycotted coverage of President Donald Trump to protest his decision to ban three news outlets from the White House. "No administration should restrict a news organization because it objects to its reporting," ABC, CBS, CNN, Fox and NBC said in a joint statement.

UN Secretary-General Antonio Guterres opened the General Assembly in New York on Tuesday for the last time before his term ends on December 31. Guterres was followed at the podium by Brazilian President Luiz Inacio Lula da Silva, US President Donald Trump and French President Emmanuel Macron. Read our liveblog for highlights and replays of their addresses. 

World leaders are gathering at the United Nations this week against a backdrop of wars in the Middle East and Ukraine, rising fears over artificial intelligence and mounting economic and climate pressures. The annual General Assembly will test whether the 193-member body can still bring countries together to tackle crises that increasingly transcend borders.

The United States, Denmark and Greenland on Tuesday signed a security agreement expanding US involvement in Greenland’s defence while affirming Danish sovereignty over the Arctic territory. 

Paramount has reached a settlement with California and 11 other states that clears a major legal hurdle to its $110 billion takeover of Warner Bros. Discovery, with the deal imposing commitments on film production, jobs and editorial independence at CNN and CBS News.

US media outlets CNN, MS NOW and Politico announced Monday they were filing suit after US President Donald Trump banned their journalists from the White House last week. The ban on the three outlets marks an escalation in the Trump administration's years-long assault on the country's press freedoms.