A far-right hate group known the world over, the Ku Klux Klan emerged in the aftermath of the Civil War. So why did it emerge? Where did it get its name from? And how has its size, focus and influence changed in the years since?

To demystify this terrorist organisation, Don spoke to Professor Kristofer Allerfeldt from the University of Exeter, England. Kristofer is the author of 'The Ku Klux Klan: An American History'.

Produced by Sophie Gee. Edited by Anisha Deva. Senior Producer was Charlotte Long.

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