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Lesions on the teeth of crack and methamphetamine addicts have a lot in common with those on the teeth of people addicted to soda, a dental researcher writes in a case study. But even people who wouldn't consider themselves "soda addicts" are at risk of dental erosion, he says.

Almost all of the federal government's actions against terrorism — from drone strikes to the prison at Guantanamo Bay — are authorized by a single law: the Authorization for the Use of Military Force. But President Obama says that with the Afghan war ending and al-Qaida weakened, it's time to limit the law's scope and ultimately have it repealed.

Young adults insured under their parents' plans were shielded from the potentially catastrophic cost of a medical emergency, a review of hospital records found. Researchers say $147 million in hospital bills were charged to insurers rather than the patients in 2011.

Amazon asked subscribers of its video-streaming service to do the jobs usually left to focus groups and executives. The company released 14 pilot TV shows, then looked at customer reviews and view counts. Amazon announced five pilots have been approved for a full season.

Also: Don Share is named the new editor of Poetry magazine; Malcolm Gladwell hates the New York Public Library.

Robert McDonough, 72, of Maine suffers from dementia and had not been seen for more than 14 hours. As a TV reporter prepared to go live, standing outside McDonough's home, an elderly man wandered into the camera shot.

The newborn boy's rescue from a pipe below a public toilet captured headlines around the world. Officials now tell local news outlets that the mother is unlikely to face charges. It was an accident, officials believe, that the frightened woman initially lied about.

Among several emotional moments during Wednesday's benefit concert for victims of the tornado that struck Moore, Okla., Lambert's struggle to sing through tears is worth watching.

The Census Bureau estimates 1.5 million Americans claim Arab ancestry. But some advocates say the Arab-American community is more than double that size.

Gross domestic product expanded at a 2.4 percent annual rate in the first quarter, the government reports. At one point, economists thought growth was closer to 3 percent in the first three months of the year.