Iran insists the Strait of Hormuz will not go back to being an open international waterway. (AP PHOTO)Iran insists the Strait of Hormuz will not go back to being an open international waterway. Iran has insisted on some measure of control over the strait, saying it will not go back to being an open international waterway, as it was before the war. Iran blocked the Strait of Hormuz, a main route for energy supplies from the Middle East, after the start of the war. The US and Iran reached a deal to open the crucial waterway in June, only for attacks to resume.