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Excess fluoride consumption is leading to tiny white marks on many people's teeth. It's mainly a cosmetic problem, but one that could be solved by lowering the fluoride in drinking water.

At a charity center in Sicily, survivors of the dangerous sea crossings from Libya to Italy face legal and economic limbo and a frosty welcome. But it's still better than the places they fled.

Just hours after Freddie Gray's funeral, hundreds of demonstrators took to the streets, burning police cars, looting stores and facing off with police. The mayor instituted a curfew.

One estimate puts the reconstruction at more than $5 billion – or about a quarter of the country's GDP. Countries — and relief groups — are pledging to help.

Bartender Ran Duan will represent the U.S. in a Bacardi international cocktail competition. His specialty? "Father's Advice," a stirred-not-shaken cocktail that's a testament to his hardworking dad.

Google will allow patent holders to "tell Google about patents they're willing to sell at a price they set." Tech firms have been targeted by "trolls" who own patents and charge them licensing fees.

Tech and telecom companies stepped up with much needed services. Facebook and Google offered tools to help those in the region let family and friends know they're OK. Other firms cut calling costs.

Since Hillary Clinton launched her presidential run, her family's foundation has been scrutinized. The Clintons responded, calling it the most transparent organization of its kind. But is that true?

Nearly 11,000 more were injured. The toll includes four Americans who died at a Mount Everest base camp. In addition to food, the U.N. says medical supplies are desperately needed.

The Afghan army is now fully in charge of combat operations. NPR's Tom Bowman heads out on a mission with troops as they engage the Taliban in one of its strongholds near the Pakistani border.