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Republicans need to pick up four seats to win control of the U.S. Senate in November. One race they're eyeing is in North Dakota, where longtime Democratic incumbent Kent Conrad is retiring. Outside spending is already in play, and the Democratic candidate is distancing herself from President Obama.

A coalition of food labor groups says that more than half of food workers continue working even when they're sick because they can't afford to take a day off. That's due to a lack of paid sick days throughout the food chain for people who pick, process, sell, cook and serve food.

Spain's economy is tottering, and the most immediate problem is the country's ailing banks. It appears increasingly likely they will need a cash infusion, but the government would like to avoid a full-fledged bailout.

More than 10 percent of the new cases of tuberculosis diagnosed in China each year are resistant to the mainstay drugs used to treat the illness. The sobering findings come from the first national survey of the disease conducted there.

Wisconsin's GOP Gov. Scott Walker made history by pushing back an effort to recall him from office. Walker's salvation was already a vital cause for the conservative movement. Now, there's speculation about what the future holds for the 45-year-old governor.

A preliminary report found the vacuum cleaner was used to clean worksites at the end of shifts.

A new study suggests that there's a slight increase in the risk of brain cancer and leukemia associated with CT scans for children. Experts say, in most cases, the risk doesn't not outweigh the benefit of the CT scan, but call on doctors to be more selective in ordering them. Audie Cornish talks to NPR's Rob Stein about the study.

CT scans provide exquisite pictures of what's happening inside the body, but they use a lot more radiation than standard X-rays. A British study details the future cancer risks from CT scans of children.

The European Union is set to stop all purchases of Iranian oil on July 1. Exports are already down, and lower prices means less profit on sales that do go through. So far, Tehran refuses to budge on its nuclear activities. But analysts say Iran has no clear way around the boycott.

The need to store digital information is growing. Tens of thousands of new jobs are expected to be created over the next six years to take full advantage of that ocean of information known as big data.