From the 2012 presidential election to the horrendous school shooting in Newtown, Conn., here is a look back at some of the biggest news stories of 2012.
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Joshua Roberts / Reuters
December 31: The U.S. is in danger of going over the so-called "fiscal cliff," which will trigger a series of tax hikes and budget cuts in next year if the White House and Congress are unable to reach a compromise on a debt reduction plan.