"No one can question that 9/11 was a colossal intelligence failure," writes our correspondent Frank Gardner. Western intelligence agencies were reorganised in the wake of the attacks to try and prevent any new atrocities, and in the following years there have been big successes as well as disastrous failures. With experts pointing to the current threats posed by China, Iran, and Russia, and with the advent of AI and quantum computing, how has the intelligence landscape changed since the worst terrorist attack in US history - and can future mistakes be prevented?

Republicans from across the US descended on Dallas this week for the party's first midterms convention. With polls suggesting the Democrats have a good chance of retaking control of the House of Representatives and possibly the Senate, it was hoped the event would energise voters. But much of its focus was on President Donald Trump, our correspondent notes, and many left wondering what the future looks like when the president's name isn't on ballot papers in 2028, with some citing concerns about where the party goes from here.