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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.