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Melissa Block and Audie Cornish read emails from listeners.

Researchers say a tax on soda could be an effective way of preventing diabetes, strokes and early deaths. But some wonder whether a tax would encourage people to substitute another empty-calorie drink, or other types of junk foods that were not taxed, for soda.

For the first time, groups can apply for Internet addresses with their own suffixes. The one U.S.-created organization empowered to regulate the global Internet planned this expansion, which highlights the debate over whether another entity, such as the U.N., should take over Internet governance.

As the deadline for a decision on a controversial oil pipeline approaches, lobbying is intensifying. The Keystone XL pipeline would transport oil from Canada's tar sands to the Gulf Coast. President Obama is caught in the middle of a jobs-vs.-environment debate.

The struggling company says it's surviving "one day at a time." But after failed mediation with its unions and a lockout in place, the clock is running out.

For Russian residents on the country's Pacific Coast, the capital of Moscow and the major cities thousands of miles away can feel less important than the dynamic Asian cities nearby.

The public relations problem for private equity capitalists at firms such as Bain, KKR and Blackstone is that they are the agents of the creative-destruction part of capitalism. They aim to take over underperforming firms and operate them more efficiently. In that process, people do lose their jobs.

Iranian President Mahmoud Ahmadinejad has completed a four-country tour of left-leaning Latin American nations. His trip came as the West increased pressure on Iran over its nuclear program.

Each year, thousands of companies converge on the Consumer Electronics Show in Las Vegas hoping to generate buzz for their gadgets. Companies that succeed need luck, good PR and a product that seems cool or useful. HzO, a small company that makes waterproof coatings for phones and tablets, has broken through in a big way.

Comedian Stephen Colbert of Comedy Central may make a run for the presidency in South Carolina. Because he may be a candidate, he legally handed the control of his superPAC over to Daily Show host Jon Stewart.