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This week, a Continental flight from Houston to Chicago used a biofuel blend made in part from algae, and Alaska Airlines will fly passengers using a fuel made in part from cooking oil. The fledgling environmental effort has many hurdles, as biofuel costs nearly six times as much as regular jet fuel.

The International Atomic Energy Agency failed to conclude definitively that the Islamic republic is engaged in a full-scale weapons program. But the agency said the evidence of hidden nuclear activity is growing, and the questions are deepening.

Abd al-Rahim al-Nashiri is the first Guantanamo detainee to have his case tried under the Obama administration's revamped rules for military commissions; he could be put to death if found guilty in the 2000 bombing of the USS Cole in Yemen. The trial is a test of whether a separate military justice system can provide the same impartial justice as a U.S. criminal court.

The nation's biggest retailer is planning to offer a wide range of medical care in U.S. stores. A Wal-Mart document seeking partners for the effort says the company aims to become a major provider of primary care. Later, an executive with the retailer said the company document was "overwritten and incorrect."

As news outlets try to figure out what Tuesday's election results tell us about what voters are thinking, they're reaching various conclusions.

Also: IMF chief warns of a "lost decade;" Greece's prime minister is expected to resign today; and Wal-Mart plans an ambitious expansion into medical care.

The Emergency Alert System has never been tested all across the nation at the same time. At 2 p.m. ET it will be.

Voters in Mississippi have rejected an amendment that would have made it the first state to declare as part of its constitution that life begins at fertilization. As recently as a few weeks ago, the so-called personhood amendment was considered almost certain to pass.

The police department is investigating, a spokesman says. Meanwhile, it has released videos of its own showing protesters threatening officers during recent clashes.

Italy's borrowing costs spiked Wednesday, pushing the country into bailout territory. But Italy is too big to be saved by Europe's bailout fund. Although the same story has played out in other European countries, an Italian default could be catastrophic.