The talks were nearly derailed on Sunday after Iranian negotiators threatened to walk out after Trump’s threats to resume attacks and take over the Strait of Hormuz.

After briefly appearing to falter, US-Iran implementation talks are back on track, with senior American and Iranian delegations converging on Switzerland for what could prove a…

The announcements indicated a rough start to the technical-level talks that key mediator Pakistan said will begin Sunday, with Qatari mediators also participating.