Iran nuclear talks are entering a critical stage. Here's what to look out for

Iran and the United States return to Vienna Tuesday for another attempt at reviving the 2015 nuclear agreement abandoned by the Trump administration. Here are some issues to watch out for that may give an indication of how the talks will progress.

Iran nuclear talks are entering a critical stage. Here's what to look out for
Iran and the United States return to Vienna Tuesday for another attempt at reviving the 2015 nuclear agreement abandoned by the Trump administration. Here are some issues to watch out for that may give an indication of how the talks will progress.