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.