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Think flossing and brushing is helping to fight off heart disease and stroke? Think again.

An expert panel of dentists and cardiologists, writing in the American Heart Association journal Circulation, says there is no evidence that treating or preventing gum disease has any direct effect on heart health.

That's a big turnaround. For the past decade, the medical establishment has been telling people that cardiovascular disease can be caused by poor oral hygiene. Why the change?

In a letter to the United Nations Security Council, Secretary General Ban Ki-moon says the Syrian government is not living up to its end of the bargain on a week-old cease-fire deal.

Ban says the government has failed to keep its pledge to withdraw troops and heavy weapons from cities, but adds that he still thinks there is "opportunity for progress."

The Secretary General's letter comes as the U.N. and Syria apparently worked out details of an observer mission to monitor the shaky deal meant to end more than a year of bloodshed that has killed an estimated 9,000 people.

A Dutch magician has threatened to tell the secret behind one of Penn & Teller's most famous bits. In this shadow illusion, an untouched rose falls apart as Teller cuts at the shadow with a knife. Teller tried to make the offer disappear by paying the Dutchman the $3,000. When that was refused, Teller sued.

John Brennan of Portland, Ore., was going through airport security when he was pulled aside for a closer look. So he removed all of his clothes, saying it was an act of protest. Facing charges, Brennan argues he was "nude but not lewd."

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LYNN NEARY, HOST:

This is MORNING EDITION, frpm NPR News. I'm Lynn Neary.

STEVE INSKEEP, HOST:

And I'm Steve Inskeep, good morning.

The Secret Service scandal has now cost three men their jobs. The government says they were involved in misconduct in South America, and they are leaving the agency. Agents, as well as military personnel, allegedly hired prostitutes in advance of President Obama's recent trip to Colombia.

NPR justice correspondent Carrie Johnson has been following this story. She's in our studios. Good morning.

There is one more week left in the lockout-shortened, action-packed NBA regular season. Chicago, Miami and Oklahoma City head toward the finals with strong records — as do the Los Angeles Lakers and San Antonio Spurs.