Two previous rounds of talks in Tehran early this year failed to make any notable progress. But both sides were more upbeat after the May 14-15 meeting in the Austrian capital, raising hopes of a possible outcome when talks resume on Monday.
Two previous rounds of talks in Tehran early this year failed to make any notable progress. But both sides were more upbeat after the May 14-15 meeting in the Austrian capital, raising hopes of a possible outcome when talks resume on Monday.
