Iran nuclear deal partly down to 'secret talks' with US
24 November 2013 Last updated at 22:28 GMT
Months of secret high-level negotiations between the US and Iran appear to have helped pave the way for the deal reached over Iran's controversial nuclear programme.
Ahead of the six-month provisional deal reached at the Geneva talks, there were numerous face-to-face meetings between Iranian and American ministers in Oman and elsewhere.
Mike Wooldridge reports.