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UPDATE: 11:37 a.m. As expected, the New York Board of Health passed a rule banning sugary drinks like soda in sizes 16 oz. or larger at restaurants, concession stands and other eateries in an effort to combat obesity today. The ban is expected to take effect in March, but according to the Wall Street Journal, opponents are already considering a legal challenge to prevent that. It passed 8-0.

Newly released census figures show a long-standing and glaring contrast: A third of families headed by single mothers are in poverty, and they are four times more likely than married-couple families to be poor. The disparity is on the rise, and as the number of single mothers grows, analysts are debating if more marriages could mean less poverty.

Federal Reserve policymakers are meeting in Washington, trying to decide whether — and exactly how — to boost the sluggish economy. Many analysts are expecting the Fed to take action, but they're also beginning to question whether another stimulus program will have any effect.

It's become conventional wisdom that President Obama's new lead in the polls is a bounce, coming out of the Democratic convention in Charlotte, N.C.

But an analysis from the Wesleyan Media Project suggests that the bounce might be due to TV ads as much as grand speeches. The Obama campaign and its allies laid out $21.1 million for TV during the two weeks of the party conventions. Over that same stretch, Republican Mitt Romney and his backers spent significantly less, $12.9 million.

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From Rahm Emanuel now to his formidable foe in these negotiations, Karen Lewis, the head of the teachers' union. Lewis in recent weeks has called the mayor a bully and of his leadership style has said, quote, "The whole idea of an imperial mayoralty where you wave a magic wand or cuss someone out and things happen is untenable."

To learn more about Lewis, we turn to Joel Hood. He's a reporter at the Chicago Tribune. Welcome, Joel.

JOEL HOOD: Thanks for having me.

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We're going to hear more now about the film that was, at least in part, the catalyst for the violence in Libya, as well as protests in Egypt. Some news outlets are saying the filmmaker has gone into hiding.

As NPR's Elizabeth Blair reports, very few people have actually seen the supposed two-hour movie, if it exists at all.

For months, the tax-exempt Crossroads GPS has argued that its anti-Obama ads were merely issue ads and not political ads. No more. Today the group went up with ads explicitly telling viewers to vote against President Obama.

Co-founded by Republican operative Karl Rove, the group began running a 30-second spot Wednesday morning in Nevada that blames a weak economy and poor housing market on Obama and ends with the wording: "This election ... don't blow another vote on Obama."

Over jeers and cheers from the audience, commissioners on the Portland, Ore., City Council voted Wednesday to add fluoride to the city's drinking water starting in 2014.

Portland is the largest American city that doesn't add fluoride to its drinking water. But some groups have raised questions about the possible risks from fluoridation and oppose its use.

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We turn now to Washington for more reaction to this brazen attack. The Obama administration is sending a Marine anti-terrorism unit to bolster security in Libya. It's also taking precautions elsewhere. The stepped up security comes as the State Department mourns its losses. NPR's Michele Kelemen has that story.

MICHELE KELEMEN, BYLINE: Shock and sadness hovered over the State Department as Secretary of State Hillary Clinton spoke of the devastating losses of four foreign service personnel.

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It didn't take long for the attacks in Benghazi and Cairo to become part of the presidential campaign. Mitt Romney jumped in first. In a statement last night before Ambassador Stevens' death had been announced, Romney accused President Obama of sympathizing with those who waged the assault. The Obama campaign responded, saying it was shocked that Romney would launch a, quote, "political attack" at this moment. And the politics have continued today as NPR's Mara Liasson reports.