Trump signs order threatening tariffs on nations doing business with Iran

WASHINGTON, Feb 6 (Reuters) - U.S. President Donald Trump signed an executive order on Friday that may impose a 25% tariff on countries that do business with Iran.The order comes as tensions between Iran and U.S. continue to simmer even as the two countries engaged in talks this week. (Reporting by Jasper Ward and Christian Martinez in Washington; editing by Michelle Nichols and Caitlin Webber)