The United States and Iran on Monday each warned they were ready for war as the clock ticked on a ceasefire, with uncertainty on talks that US President Donald Trump had announced would resume in Pakistan.The White House said Vice-President J.D. Vance was ready to fly back to the Pakistani capital Islamabad, which was visibly preparing for a second round of talks on ending the war that has engulfed the Middle East and shaken global markets.But Tehran’s cleric-run government declined to confirm...