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The U.S.-funded aerial spraying program has been aimed at killing the plants that feed the cocaine industry. Colombia says one of the chemicals in the spray may cause illnesses.

GOP presidential hopefuls converged in Iowa for the Lincoln Day Dinner. More candidates are entering the presidential race, in part, because there is no obvious next-in-line for the GOP nomination.

What if microbes could ferment sugar into narcotics, like the way yeasts make beer? That day is quickly approaching. This week scientists report all the steps needed to make morphine in yeast.

Newly declassified materials include books, magazines and letters found during the 2011 raid on the al-Qaida leader's compound in Abbottabad, Pakistan.

There's an unusual bipartisan consensus in Washington on the need to overhaul the justice system. But there are competing proposals and, as one advocate says, "expectations are very high."

After its 2014 Advanced Placement U.S. history framework became a target of intense criticism, the College Board did something unusual: It agreed to a rewrite.

Much of the focus in this week's Republican debate was on Donald Trump. But the debate was just important to a handful of underdog candidates, who have been struggling to get noticed.

Presidential candidates Hillary Clinton, Bernie Sanders and Donald Trump all found themselves doing the same thing today — campaigning at the Iowa State Fair.

Three years ago, the court struck down mandatory life sentences in cases involving juvenile defendants. Should that ruling be applied retroactively to those sentenced to life long ago?

United Auto Workers has ratified a new contract with Fiat-Chrysler. It was settled across a conference table, in a time-frame agreeable to both parties. But, it hasn't always been that way.