Mitt Romney won the GOP presidential primary in Ohio Tuesday night. Unlike most of the other states voting on Super Tuesday, Ohio will be a pivotal swing state in the general election.

President Obama held a wide-ranging news conference Tuesday. He bluntly challenged Republican critics of his Iran policy — saying the stakes are too high to let politics intrude. The news conference was designed to steal some of the spotlight from GOP presidential hopefuls on Super Tuesday.

Mitt Romney won six of the 10 Super Tuesday contests. Rick Santorum won three while Newt Gingrich won one. Ron Paul was the only candidate who did not win at least one contest.

Wind power is all the rage in Oklahoma and could be a boon in a state that has been hit hard by unemployment. The problem is finding qualified people to work in the industry.

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STEVE INSKEEP, HOST:

It's MORNING EDITION from NPR News. I'm Steve Inskeep.

RENEE MONTAGNE, HOST:

And I'm Renee Montagne.

It was the biggest day yet in the Republican presidential race. Mitt Romney hoped that Super Tuesday would reinforce his frontrunner status. And to some degree it did. He won six of the 10 states, including the most populous and hotly contested state, Ohio.

Renee Montagne talks to Terry Emmert, who's in charge of transporting a 340 ton granite boulder to the Los Angeles County Museum of Art, where it will be featured in a modern art exhibit.

In Houston Tuesday, a federal jury convicted Texas financier R. Allen Stanford of running a massive Ponzi scheme. Jurors agreed with prosecutors, who claimed he ran a global scheme that lasted more than 20 years and involved more than $7 billion in investments.

Another year of growth was enough to edge Brazil past the stagnant United Kingdom in global economic rankings. Agriculture and food processing were the big areas of growth for Brazil.

The race between two veteran Ohio Democrats, Rep. Marcy Kaptur and Rep. Dennis Kucinich who were redistricted into the same congressional district ended badly for Kucinich who lost to his fellow House Democrat.

Meanwhile, the House Republican Conference will lose Rep. Jean Schmidt, who was defeated by Brad Wenstrup, a podiatrist and Iraq War veteran, in an upset.

When the state of California added the compound 4-methylimidazole, also known as 4-MI or 4-MEI, to its list of known carcinogens in 2011, it created a problem for the soda industry.

The caramel color they used to give colas that distinctive, brown hue contained levels of 4-MI that would have warranted a cancer warning label on every can sold in the state.