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A colorful and bustling prairie outside Chicago becomes the site of a manufacturing facility for ammunition during World War II, AKA the Joliet Arsenal. But the history of the area goes back well beyond that. Larry Potash has the backstory.

Backstory airs Saturday nights at 10:30 on WGN. Catch up on previous seasons of Backstory with the podcast at via Stitcher, iTunes, Google Play, or wherever you get your podcasts.