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Silicon Valley will soon open up a high-tech water recycling facility, capable of turning treated sewage into crystal clean water. In theory, it should be better than what comes out of kitchen sinks today. The purification is tough, but the hardest challenge is convincing people to drink it, even as freshwater becomes more scarce.

For six decades, in her light-filled studio on top of New York's Carnegie Hall, Sherman photographed celebrities from Leonard Bernstein to Yul Brynner to Joe DiMaggio. She was a legend as a portrait photographer — and she'd tell you that herself.

New public opinion polls show distaste for National Security Agency surveillance does not break cleanly across party lines. Despite the administration's attempts otherwise, one new study finds that the more people know about the NSA, the more they dislike it.

Trading in shares of the social-networking site Twitter began Thursday on the New York Stock Exchange. It's been the best year for initial public offerings since 2007. And the Twitter IPO was the most eagerly awaited of the year.

A test for a virus linked to cervical cancer has been around for 10 years. But a lot of doctors still don't recommended it routinely for women. Female doctors are more likely to prescribe it than their males colleagues.

Kraft says it's ditching two artificial dyes in some of its macaroni and cheese products. But why did we start coloring cheeses orange to begin with? Turn's out there's a curious history here.

The Secret Service made some immediate changes after the president's death 50 years ago this month: Open limousines were out. And it began taking a more aggressive approach to its advance work. Over the years, the service has established counter-sniper units, assault teams and surveillance units.

Schools nationwide are under growing pressure to add instructional time, and recess is often one of the first things to get squeezed — particularly in low-income districts. But some schools are pushing back, embracing play time and physical activity as central to learning.

A hairdresser in Alaska is one of the first people to get health insurance through HealthCare.gov. The 37-year-old woman has a chronic thyroid problem, so she's thrilled to find affordable coverage. Insurers are bracing for sick people like her to be among the first entering the market.

Two teenage sisters who were sexually abused talk about how they supported each other through the ordeal.