This week marks twenty-five years since the United States suffered a terrorist attack that was predicted to change the world forever.

Today, international and political editor Peter Hartcher talks about the lessons that the US learned – and failed to learn – and examines the costs and rewards of Australia's full-throated support of its ally following the attack.

Hartcher also discusses what Australia's alliance looks like today in the face of Donald Trump's presidency.

The Morning Edition brings you the story behind the story with the best journalists in Australia. Join host Samantha Selinger-Morris, from the newsrooms of The Sydney Morning Herald and The Age, weekdays from 5am.

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