The 100 richest people in the world gained $241 billion in net worth last year, according to Bloomberg's Billionaires Index. Americans dominated the list, occupying five of the top 10 spots. This countdown of the top 10 wealthiest Americans features a casino mogul, software tycoons, and a lot of Wal-Mart money.
Some of America's biggest and most economically vibrant cities, including Boston and New York, are also the most unequal, according to a new report on income inequality from the Brookings Institution.
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