A long-awaited round of US-Iran diplomacy in the Swiss Alps curdled within hours on Sunday, after a profane threat from President Donald Trump landed in the middle of the negotiations and sent Tehran's team into recess.
Vice President JD Vance opened the talks at the Burgenstock resort above Lake Lucerne on 21 June 2026, calling it a chance to 'transform' relations with Iran, the Associated Press reported. Iranian state media said the session ran about 80 minutes before entering a difficult phase and recessing.