Ayatollah Ali Khamenei’s recent comment that there was “no barrier” for engaging enemies in talks is being taken as a tacit opening for possible negotiations with the US and the West. That’s revived hope for a nuclear deal akin to the Joint Comprehensive Plan of Action that checked Iran’s nuclear program in exchange for sanctions relief. Ali Vaez, director for the Iran Project at the International Crisis Group, discusses the meaning behind Khamenei’s remarks with The World’s Carolyn Beeler.