Assignment - Iran in crisis
The fall-out from the Iranian presidential elections has reverberated around the world.
The BBC's World Affairs Editor, John Simpson, was in Tehran as the protests against the outcome of the vote reached their climax. John's been reporting on Iran since the Islamic revolution of 1979 and, in a change to the advertised schedule, he reflects on what he saw during the two weeks he was there.
In this special edition of Assignment, he reveals exclusive new material that exposes how the protests, and the police reprisals that followed, are intricately linked to the rivalry inside the clique of clerics who created the Islamic state.