Brewing giants like Anheuser-Busch and Coors dominate beer sales in the United States -- but independent brewers have been steadily gaining market share. More than 500,000 people work in the $80 billion craft brewing industry, adding an estimated $5 billion to the economy. But now, craft brewers fear their profits could plummet if a provision in the nation's tax law is allowed to expire. Barry Petersen reports.
