Iran's defensive options in the Strait

Donald Trump has kept the world guessing over whether he will launch a ground invasion in Iran.

However, the arrival of thousands of US paratroopers in the region might be the clearest indication yet of the disrupter-in-chief’s thinking.

A month of airstrikes is one thing but the deployment of troops is quite another - so how would it work? Has Trump learned nothing from Iraq and Afghanistan?

Niall is joined by the former head of the UK armed forces General Sir Nick Carter.

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