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Republican presidential nominee Mitt Romney marked the anniversary of Sept. 11 with a speech to the National Guard Association Convention in Reno, Nev. Melissa Block talks to Ari Shapiro.

Too many bad nights' sleep can raise the risk of heart attack and high blood pressure. Researchers say highway noise should be added to the list of environmental pollutants.

In a pop culture slur, the mayor of Chicago was accused by picketers of liking the Canadian rock band.

Though summer melting is a yearly occurrence in the Arctic sea, this year set a new benchmark: Three-fourths of the ice melted away. Scientists say the effects of this unprecedented melting are likely to result in extreme weather changes throughout the Northern Hemisphere.

Crossroads GPS, an anti-Obama group co-founded by GOP political strategist Karl Rove, is shifting its ad strategy. It's going from so-called issue ads that purportedly educated voters on why the president was wrong on issues to directly urging for voters to vote against him.

The ongoing European debt crisis is expected to pose major challenges to the next U.S. administration.

At the center of the Chicago teachers' strike are Mayor Rahm Emanuel and the head of the teachers' union, Karen Lewis. To learn more about Lewis and the relationship between the teachers' union and the mayor's office, Audie Cornish talks to Joel Hood, education reporter at the Chicago Tribune.

Secretary of State Hillary Clinton spoke Wednesday morning about the deaths of four Americans, including the U.S. ambassador, after an attack on the American consulate in Benghazi, Libya. We hear some of her remarks.

The Federal Reserve is meeting in Washington to discuss what to do with the sluggish economy. Analysts believe the Fed will take action, but some economists wonder if it will have an effect — or even be counterproductive.

The Fed has the power to create money. But it has another, critical power: The power of words.