US President Donald Trump has imposed sanctions on Iran's iron, steel, aluminium and copper sectors. The move is aimed at stopping Tehran from acquiring a nuclear weapon and intercontinental ballistic missiles.<br />''<br />''<br />''A year after he withdrew from the Iran nuclear deal and began the process of reimposing sanctions on Tehran, Mr Trump with his new move has now imposed sanctions on Iran's top three exports – oil, petrochemicals and metals.<br />''<br />''<br />''<span style="color: #222222;">The White House said, the US will aggressively enforce its sanctions, and those who continue to engage in a sanctionable activity involving Iran will face severe consequences. </span><br />