President uses social media post to deny reports that he was willing to ease sanctions in return for ‘concrete’ steps over its nuclear program Sign up to the US Breaking News email Hello and welcome to the US politics live blog. President Donald Trump said he has offered Iran nothing to end the war, rejecting media reports that cited US officials saying he was willing to ease sanctions and release frozen funds for “concrete” steps regarding Iran’s nuclear program. Anthropic will caution investors that artificial intelligence could pose “catastrophic or existential risks to humanity” in its IPO prospectus. As Anthropic prepares for an IPO listing, which could value the AI company at a monumental $2tn, it dedicated almost a third of its prospectus to discussing concerns around AI safety.