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I'm Tristan Redmond, one of the hosts of the Global Story podcast from the BBC.
How would the US invade Iran?
Different options are on the table, but the Pentagon has wargamed this for years.
And our guest today was in the room for many of them.
What are Donald Trump's remaining military options?
Listen to the Global Story on bbc. com or wherever you get your podcasts.
This is the Global News Podcast from the BBC World Service.
I'm Valerie Sanderson and at 16 Hours GMT on Wednesday the 1st of April, these are our main stories.
Stock markets rise as President Trump promises the end of the war with Iran within the next three weeks.
We get access to the views of people living inside Iran.
Also, India's census of its population of 1.4 billion gets underway.
Also in this podcast.
Russian government does n't want people to access things on the internet,
free speech, does n't want people to access Western media.
Russia clamps down on the social media messaging app Telegram.
As we record this podcast, President Trump is due to address the nation about progress on the war with Iran.
Mr Trump says he 's achieved his aim of destroying all of Iran's nuclear capabilities and has promised an end
to the conflict within two to three weeks.
Because of the effect of the US-Israeli war with Iran on the global economy,