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I'm Helena Merriman and in a new BBC series,
I'm talking to the reporters who first covered this story.
What did they miss the first time?
The History Bureau, Putin and the apartment bombs.
Listen on bbc.com or wherever you get your podcasts.
Welcome to the inquiry from the BBC World Service with me, Daniel Rosny.
Each week, one question, four expert witnesses and an answer.
December 2025 The real Iran's currency suffers another sharp fall against the US dollar on the open market.
The value is recorded as the lowest in history.
Inflation in the country is at 40%.
Everyday items like cooking oil, bread and meat become unaffordable.
Shopkeepers from the capital's Grand Bazaar,
angry at the nation's economic situation, stage a strike.
Within days, there are demonstrations in multiple cities with wider calls for political change.
Crowds are heard demanding the removal of the country's supreme leader.
Cars are set on fire and there are clashes between those on the streets and the security forces.
Within three weeks, thousands are killed.
It's the most serious challenge to the country's current leadership
since the 1979 revolution which overthrew the monarchy and an Islamic republic was born.