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The controversial project to expand an oil pipeline running from Canada to the Gulf of Mexico has failed to get the approval of Congress.

With this year's enrollment in Obamacare brisk, Health and Human Services Secretary Sylvia Burwell says she's not worried that the U.S. Supreme Court may yet overturn a key provision of the law.

A few years ago, amid a global recession, Brazil was the darling of the financial markets. But last year, the country barely avoided recession. Prices are soaring, and investors are looking elsewhere.

It's been tough to design tests because some people object to the idea that a comparison group won't receive the vaccine. But plans are moving ahead.

Fertilizer runoff has provoked a confrontation between Des Moines and the farms that surround it. The city's water utility wants to sue neighboring counties for nitrates in the Raccoon River.

As the Civil War was winding down 150 years ago, Union leaders asked their men how they could help the thousands of newly freed slaves.

While France's leaders had feared an attack, Ambassador Gerard Araud says, "what happened was in a sense maybe worse than what we were expecting, because it was done in a very professional way."

How long can you sit still in a desk? How about your 7-year-old? Maybe you could both use a break. A study shows that kids who get to run around and play after school are better at paying attention.

The state's attorney general says nearly three-quarters of Airbnb's listings in New York City are illegal. The company says local laws should be changed to accommodate the sharing economy.

For most of 2014, Afghanistan was suffering from economic paralysis as its presidential election teetered on the brink of collapse. The inauguration of President Ashraf Ghani eased tensions and buoyed optimism that business will turn around.