WASHINGTON/DUBAI - The United States and Iran exchanged fire on Thursday in the most serious test yet of their monthlong ceasefire, but Iran said the situation returned to normal while the ​Americans said they did not want to escalate.Iran's military said the U.S. targeted two ships entering the Strait of Hormuz ‌and carried ‌out strikes on Iranian territory. The U.S. military said it fired in response to Iranian attacks.Trump ​told an ABC reporter that the ceasefire was still in effect and sought to downplay the exchange. 'It's just a love tap,' Trump told the reporter, according to her social media post. Iranian state media said after the strikes that the situation was ⁠back to normal.