The long-running nuclear talks were a magnet for the world’s intelligence agencies as they sought to find out more about the Iranian nuclear programme and the negotiating positions of the six nations involved.
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The US secretary of state, John Kerry, would take walks with his Iranian counterpart, Mohammad Javad Zarif, in what was seen as a publicity stunt, but which was also a practical means of dodging electronic bugs.
When diplomats attending talks in Lausanne wanted to call their capitals, they would stroll around the grounds of the venue, another five-star hotel, rather than call from their rooms. more