CHICAGO (CBS) — Filmmaker Ken Burns was in Chicago Tuesday night, previewing his latest documentary in front of a crowd at the Chicago History Museum.

They drank cocktails with names like the bees knees and clover club.

Then they saw clips of ‘Prohibition’–a five-and-a-half-hour documentary slated to air Oct. 2-4 on PBS.

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“It’s not that sin is so terrible, it’s that sin is very attractive,” Burns said of an era in American history when speakeasies and brothels, especially in Chicago’s infamous old Levee District, were a big attraction.

As one might imagine, the home of Al Capone plays a major role in the film.

Burns calls Chicago the quintessential American city.

He credits the museum with providing the archives, photos, maps and other pieces of history that he used as the building blocks for the documentary.

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