Friday Festivals: Karner Blue Butterfly Festival

This week's exploration of the upper Midwest's many summer festivals brings us about 50 miles east of Winona, Minn. to Black River Falls, Wis.

• Photos: More summer festivals

This weekend it's putting on its 18th annual Karner Blue Butterfly Festival, which starts Friday and runs through Saturday night.

Joe Williams, who runs the Buzz and Brew shop in downtown Black River Falls joined MPR's Tom Crann to talk about the Karner blue butterfly and the origins of the festival.

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