US President Donald Trump on Tuesday vowed to respond after Iran shot down a US military helicopter that was patrolling the Strait of Hormuz. “I have just been informed by our Great Military that last night the Iranians shot down one of our highly sophisticated Apache Helicopters while patrolling over the Strait of Hormuz,” Trump wrote in a social media post. “Nevertheless, the United States must, of necessity, respond to this attack,” he said, adding that the two US pilots involved in the...