Whiskey is booming. Once the drink of gruff old cowboys, today whiskeys like bourbon and rye are surging in popularity with young Americans. More than 130 new brands were introduced just this year.

Most popular are the so-called hand-crafted bourbons. But there's a dirty little secret in the distilling industry: Many companies don't make what they bottle, even though their labels give the impression that they do -- a sore point for the growing legions of whiskey purists across the country.

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