Tim Harford of the podcast Cautionary Tales sits down with David McRaney to hear a story from David's book, How Minds Change, about how (and why) a prominent conspiracy theorist realized he was wrong.

Charlie Veitch was certain that 9/11 was an inside job. The attack on the World Trade Center wasn’t the work of Al-Qaeda, but an elaborate conspiracy. He became a darling of so-called “9/11 truthers” until he actually visited Ground Zero to meet architects, engineers and the relatives of the dead.

The trip changed his mind. His fellow “truthers” did not take Charlie’s conversion well.

Kitted

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