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When National Intelligence Director James Clapper was asked in March by Sen. Ron Wyden if the NSA collects "any type of data at all on millions, or hundreds of millions of Americans," he answered, "No sir," before adding, "Not wittingly." Clapper says that answer was clearly wrong.

After a rough loss at Wimbledon last week, many fans are wondering if this is the end for the Swiss tennis star.

David Green says capitalism practiced with empathy is the right way to make health care available to the masses. The social entrepreneur is working on medical devices and services that can make a difference in the developing world.

Small-scale protests are continuing in Brazil but the massive movement has died down as quickly as it flared up. One of the reasons is protest confusion. The perils of having no leadership are that people don't know what protests are real.

A new study shows women are dying from overdoses of prescription painkillers at a much higher rate than ever before. Men still suffer more overdoses but women are catching up, fast. Since 2007, more women have died from drug overdoses than from motor vehicle crashes.

The American health system is well-suited to fixing acute problems. But chronic issues, such as diabetes and obesity, have proved challenging. Prevention could reduce the risks, yet the approach hasn't taken hold. Here's a leading medical thinker's take on why, and how to fix things.

In 2011, California listed 4-MEI, the chemical that Coke and Pepsi used to obtain caramel coloring for their colas, as a carcinogen. Both sodas have been reformulated for sale in the state — but tests show 4-MEI is still common in Pepsi colas sold elsewhere.

The Cincinnati Reds pitcher threw the second no-no of his career Tuesday night. But if not for the quick thinking of first baseman Joey Votto, the no-hitter would have been spoiled in the seventh inning. Watch the video to see what happened.

Royce Lamberth, the retiring judge who led the secret Foreign Intelligence Surveillance Court from 1995 to 2002, says he has no regrets when he talks about that court's business. In his view, another attack, in some form or other, is inevitable.

At a hearing this morning, Ariel Castro also asked to have contact with a child he fathered with one of the women he is accused of holding captive for years in his house. That request was denied.