Traders work in their booth on the floor of the New York Stock Exchange Friday, March 8, 2013. Stocks are opening higher on Wall Street after the government reported a burst of hiring

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Traders work in their booth on the floor of the New York Stock Exchange Friday, March 8, 2013. Stocks are opening higher on Wall Street after the government reported a burst of hiring last month that sent the unemployment rate to a four-year low. (AP Photo/Richard Drew) less