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Craft Brews Slowly Chipping Away At Big Beer's Dominance

Beer is a $200 billion a year business in the U.S., but most of that money goes to the two companies, Anheuser-Busch InBev and MillerCoors. But smaller "craft" breweries are challenging that dominance, and it's a battle that's being waged on grocery store shelves and the taps at your local pub.