Ukraine's military claimed Tuesday for the first time that it encountered an Iranian-supplied suicide drone used by Russia on the battlefield, showing the deepening ties between Moscow and Tehran as the Islamic Republic's tattered nuclear deal with world powers hangs in the balance. U.S. intelligence publicly warned back in July that Tehran planned to send hundreds of the bomb-carrying drones to Russia to aid its war on Ukraine. While Iran initially denied it, the head of its paramilitary Revolutionary Guard has boasted in recent days about arming the world's top powers. The Ukrainian military's Strategic Communications Directorate published images of...