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Plosky Tolbachnik volcano erupts in Russia's Far Eastern Kamchatka Peninsula on Jan. 6, 2013. It's not a so-called "super volcano," but every million years or so scientists say the Earth burps up volcanoes that can erupt for thousands of years. Alexander Petrov/AP hide caption

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Pedestrians pass the Dow Jones display ticker in Times Square on Wednesday in New York. U.S. shoppers spent cautiously this holiday season, a disappointment for retailers that slashed prices to lure people into stores and now must hope for a post-Christmas burst of spending. Frank Franklin II/AP hide caption

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