View images of public enemy number one, mobster Al Capone, as well as other gangsters, bootleggers, and violent gangs of the era. From 1920-1933, the United States was a dry country. The 18th Amendment to the Constitution prohibited the making, transportation, and sale of alcohol. The law, as explained in the Ken Burns’ film Prohibition, “turned law-abiding citizens into criminals.” It also proved to be a lucrative business venture for gangsters and bootleggers, who took over once legitimate businesses to illegally supply alcohol to Americans. The prominence and power of gangsters during Prohibition grew as a result.