JD Vance has reached Switzerland to open formal talks with Iranian leaders on the nuclear programme and a wider interim war deal. The 60-day push now faces pressure from Strait of Hormuz tensions and Israel-Hezbollah fighting.

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 decisive phase in turning a fragile wartime memorandum into a broader political settlement.