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The U.N. ambassador may be tapped by President Obama to be the next secretary of state. Before then, though, she'll face more questions from lawmakers about what she and other officials said and knew about the attack in the days after it happened.

A computer science study shows that when an orchestra's musicians closely follow the lead of the conductor, rather than one another, they produce better music.

For years, colleges have competed to attract diverse student bodies by offering students admission without considering their ability to pay. But as costs rise and student need increases, even schools with big endowments are beginning to acknowledge that their generosity is unsustainable.

The White House says it won't make the same mistake it made when the president was first elected. Then, the Obama team didn't really do much to reach out, despite an email database of 11 million supporters.

The number of new HIV infections in the U.S. is relatively stable at about 50,000 people a year. But HIV is on the rise in people under 25, federal data show. The upswing is driven largely by infections among young black men.

The pace of destruction of the Brazilian Amazon is at its lowest rate in more than two decades, says a new government report. According to data, 4,656 square kilometers of the rainforest were deforested in the 12 months through July 2012 — a 27 percent decrease from the previous year.

For decades, the Turkish-occupied north lagged far behind the independent nation to the south, with its strong ties to Greece. Now, it's the Turks in northern Cyprus who have the roaring economy, as Greek Cypriots await the terms of an EU bailout.

Mexico has a very high rate of school bullying. Many teachers, parents, and psychologists say it's connected to increased violence of the drug war. And it's not just that kids pick on each other more — the way they do it has changed, too, with children's games and bullying increasingly mimicking and glorifying organized crime.

She is a wildly popular singer, AIDS activist and major general in the Chinese army. Now, Peng Liyuan is slated to add another title: first lady of China. Peng's husband, Xi Jinping, is expected to become the country's president next year. Military garb has replaced her fabulous costumes as China's image-makers ensure she doesn't overshadow Xi.

The test long used to demonstrate high school equivalency is getting an overhaul. Many educators agree it's time for an update, but the new GED will be much more expensive and administered only on computers. Some are worried the new exam will be out of reach for many test takers.