Vienna: What are the chances to salvage the Iran nuclear deal?

Vienna: Representatives of Iran and diplomats from Britain, China, France, Germany and Russia are gathering at the Palais Coburg hotel in Vienna on Monday to begin two days of talks aimed at salvaging the 2015 international nuclear agreement officially known as the Joint Comprehensive Plan of Action or JCPOA.    

The United States is taking part in the talks indirectly, with diplomats from the other countries acting as go-betweens. The negotiations are aimed at bringing Iran back into full compliance with the agreement and paving the way for the US to rejoin it. The new round of talks comes after a hiatus triggered by the June election of hard-line cleric Ebrahim Raisi as Iran's president.