Donald Trump insists ceasefire remains intact after the most serious test yet. Plus, David Attenborough’s 100 most spectacular moments Don’t already get First Thing in your inbox? Sign up here Good morning. The US and Iran traded fire late on Thursday in the greatest test so far to their month-long ceasefire. Tehran accused Washington of breaching the truce by targeting two ships in the strait of Hormuz and attacking civilian areas, while the US said it had struck in retaliation. Where were negotiations up to before the strikes? There were reports the two sides could be nearing an agreement to halt the war, with a one-page memorandum shared between Washington and Tehran, via Pakistan. Here is a rundown of the ins and outs over the past week. What happened to Trump’s “Project Freedom”? The