Technology correspondent Mark Pesce joins Kathryn to talk about a pledge between AI companies and US President Joe Biden that would see them ensure products are safe before release, put security first and ways for users to determine what is AI-generated. But it's not binding - so is this just a way for the companies to get themselves out of regulatory oversight? Researchers in California have found a way for robots to teach each other - what will they be learning? Twitter is now X - but it's rollout hasn't exactly been smooth, with possible trademark issues and trouble getting 'Twitter' off the side of the building.