The Roaring Twenties saw ethnic tensions and unprecedented prosperity. Bootlegging activities, gangsters such as Al Capone, and the underground trade of whisky smuggling used the caves around Cypress Hills, and the Soo Line Railroad which ended in Moose Jaw, the Sin City of the north, or Little Chicago. The Bronfman family became rich during Prohibition by shipping liquor into the United States, where it was illegal. Under the leadership of brothers Sam and Harry, the family based most of its operations out of Yorkton and Regina, while maintaining a warehouse in Moose Jaw.