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Some 12,000 Americans die every year in traffic crashes caused by speeding, according to government statistics. Officials have tried many strategies to get drivers to slow down. And now they might have found something that works, after researchers placed a GPS device inside cars that gives drivers an incentive not to speed.

Traffic safety experts have tried using big flashing signs to tell you how fast you're going. (The psychological subtext: Drivers are rational, and they will slow down if they know how fast they're going.)

As Americans watched their nest eggs sink during the Great Recession, many wondered whether they would ever be able to retire. Come this fall, millions of workers who invest in 401(k)s will learn their plans are probably worth even less than they thought.

"Fees take away from the accumulated savings of your lifetime," says Mary Beth Franklin, a contributing editor at InvestmentNews.

Mexicans go to the polls July 1 to choose their next president, and polls show that voters seem inclined to embrace the past. The center-left Institutional Revolutionary Party, or PRI, which ruled the country for more than seven decades before being ousted 12 years ago, holds a solid lead.

But Mexico's young are making their voices heard: Some fear a return of authoritarian rule; others simply want jobs.

Making Noise

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LINDA WERTHEIMER, HOST:

The founder of WikiLeaks, Julian Assange, spent the night at the embassy of Ecuador in London. Yesterday, he unexpectedly walked into the embassy and requested political asylum. Assange is seeking to avoid being extradited from Britain to Sweden, where he's wanted for questioning about allegations of sex crimes, including rape. We're joined by NPR's Phil Reeves in London. Phil, why do this now?

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RENEE MONTAGNE, HOST: