As the war in Vietnam spiralled out of control, US president Lyndon B Johnson was confronted by a different type of threat: a fake report so convincing that it tricked Americans into believing dangerous disinformation. But that was never the intention. Revisiting The Report From Iron Mountain, journalist Phil Tinline speaks to James Osborne, to reveal how a satirical report evolved into something far more sinister than anyone could have predicted.
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The HistoryExtra podcast is produced by the team behind BBC History Magazine.
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