All Things Considered

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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Europe's debt crisis has caused havoc, toppling governments, breaking banks, leaving a multitude of young people without jobs. Now there's a glimmer of hope.

As NPR's Philip Reeves reports, today, Germany's highest court cleared the way for the next big step in the eurozone's grand plan to save itself.

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It's the third day of the teachers' strike in Chicago. For the first time in 25 years, teachers are on the picket line and 350,000 students are out of class. The strike poses a unique challenge for Chicago's Mayor Rahm Emanuel. That's because he's also one of President Obama's top fund-raisers and surrogates.

From Chicago, NPR's Sonari Glinton reports.

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SECRETARY HILLARY CLINTON: This is an attack that should shock the conscience of people of all faiths around the world.

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Every election season Republicans and Democrats tried to rally their base and to go after undecided voters. They're increasingly using the Internet in Get Out The Vote efforts.

NPR correspondent Shankar Vedantam, who reports on social science research, joins me now to talk about how Facebook could become a potent weapon in going after the biggest untapped voting bloc in the nation. Shankar, welcome.

SHANKAR VEDANTAM, BYLINE: Hi, Melissa.

BLOCK: Who are these mystery voters, this untapped voting bloc that we mentioned?