The United States and Iran have been engaged in a military standoff for seven days around the Strait of Hormuz, raising concerns about the threat of war in the Middle East. The United States is expanding its airstrike targets inland in Iran and reinforcing its military strength by deploying additional aerial refueling aircraft to Israel. Iran has also attacked US military facilities and warned of an "all-out offensive". The number of ships passing through the Strait of Hormuz has plummeted, raising concerns about a significant impact on global trade.