JANUARY
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America's first pot stores open in Colorado
On Jan. 1, Colorado became the first U.S. state to sell recreational marijuana; Washington state joined the party mid-year, and other states loosened their laws as well.
AP Photo/Brennan Linsley
Polar vortex plunges U.S. into deep freeze
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Some areas dropped to their coldest temperatures in years as a polar vortex flooded the country from Canada, spreading into the Midwest and expanding to other states from coast to coast.
California drought
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After record high temperatures and record low amounts of precipitation for much of the winter, California had a classic recipe for an intensifying drought that shows now sign of ending. Read more...
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