Dario Amodei was surprisingly chipper when he sat down with The Economist’s editor-in-chief, Zanny Minton Beddoes, for an interview yesterday. The boss of Anthropic, an American AI lab worth $380bn, is in a bitter spat with Donald Trump’s administration that could have a “chilling” impact on his business, Mr Amodei admits. The row reveals much about who ultimately controls the world’s most powerful technology. You’ll be able to watch the full interview from 6pm London time today.

And the conflict that began on February 28th with an American and Israeli attack on Iran can rightly be called the third Gulf war. It has drawn in all eight countries that border the Persian Gulf, along with more than half a dozen others. Our briefing explains how the fighting has already transformed the region.