www.bbc.co.uk/iplayer/episode/p00d873t/Witness_Revolution_in_Iran
The first week of February 1979 saw a revolution unfolding in Iran.
After the Shah had left, and Ayatollah Khomeini had arrived back in the country, it was only a matter of time before the Islamic revolution in Iran was complete.
Mohsen Sazegara was at the heart of those changes - he talks to Witness.