Iran calls talks with U.S. “more constructive” as Trump’s threat looms

Iran and the U.S. traded threats and warnings even as negotiators sat down to discuss a deal to avert a war, but Tehran says “we now have a clearer path ahead.”Iran and the U.S. traded threats and warnings even as negotiators sat down to discuss a deal to avert a war, but Tehran says “we now have a clearer path ahead.” World – CBSNews.com