Some national flags are created to unify nations, but others are simply based on myths. The Danes believe God threw theirs from heaven, and the Catalonians tell the story of a severed arm dragged across a shield. Vexilloligist and author Tim Marshall joins us to explain these myths and the complex politics of national flags. Marshall's new book is A Flag Worth Dying For.

In the Spiel, a right-wing provocateur provokes often, but not well.

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