McCain favors less government spending, often chastising congressional colleagues for pork barrel earmarks and criticizing the budget process that allows them.

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As the thorough and at times interactive tour moves up each floor, visitors learn about the beer's state-of-the-art brewing process, its "cooperage" (barrel-making) and how it's transported to more than 150 countries.

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Extracting the bitumen from the clay and sand and upgrading it into crude oil--by breaking its big hydrocarbon molecules into smaller, less viscous ones--is an expensive, energy-intensive process that consumes 650 cubic feet of natural gas for every barrel.

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Single barrel is a bit of a misnomer because it is a two-stage aging process.

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