With tensions soaring after he ordered the killing of a top Iranian general, US President Donald Trump publicly urged all other powers to abandon a 2015 nuclear accord with Tehran.
Within hours, British Prime Minister Boris Johnson, one of Trump's closest international allies, was on the phone with Iran's president. His message? That, according to Downing Street, the nuclear deal remains "the best arrangement currently available."
Read the full story and more in Agence France-Presse.