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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.
This is a special edition of the Global News podcast from the BBC World Service.
I'm Will Chalk.
Iran has warned Donald Trump it's prepared to teach him an unforgettable lesson.
It's after the US President warned he was considering very strong options.
Clearly,
what started last month as a demonstration in Iran's capital Tehran about the country's faltering economy has already grown into something much bigger.
Hundreds of people have reportedly been killed as the protests continue to spread across the country,
and internet blackout is still in place, making it difficult to get information.
The BBC has been taking questions from our audience about what this all means and what's at stake.
So let's hear from my colleague Matthew Amrolywala,
who's been speaking to two of the BBC's diplomatic correspondents,
Caroline Hawley in London and Paul Adams in Washington, as well as Siivash Adalan from BBC Persian.
Sivash, to you first of all, as I say, we're into the third straight week of this.
From the fragments of information that's coming in, what can you tell us?
The main fragment of information that came out was a video clip,