A U.S. military strike against Iran would be an act of war that would prompt an "unprecedented" response, an Iranian official has warned amid heightened tensions in the Middle East. Former Secretary of Iran’s Supreme National Security Council, Ali Shamkhani, said that the U.S., Israel and "all who support the aggressor" would be targets for Iran if there were an American strike. Newsweek has contacted the White House for comment. Fears of a U.S. attack on Iran are growing after President Donald