"Iraq, in my judgment, almost completely unraveled in 2006, and the very beginning of 2007, as sectarian violence after February '06 just spiraled up, " Crocker said.

CNN: Iraq is now the central front on the war on terror, general says

For the last three years, prices have been higher in February with gains of 4.06% in 2012, 2.95% in 2011, and 2.85% in 2010.

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