How would World War II have turned out of the Nazis had successfully developed Nuclear weapons? And what does a small town in downstate Illinois have to do with having prevented that from happening?

Larry Potash digs deep into military history in this Backstory segment and the crucial role a pastor from a small town in Illinois and others played in a long-lost World War II operation.

Backstory airs Saturday nights at 7 p.m. and Sunday nights at 11 p.m. on WGN-TV and on the WGN+ app, available on Amazon, Roku, Apple TV, and any smart TV.

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