Morning Edition

The action by China's central bank widens the range at which the currency can be traded on the international market. The move is seen as seen a step toward addressing foreign complaints that China was suppressing the value of its money to boost Chinese exports, and hurt foreign imports.

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Let's turn now, to the economics of a good meal. Tyler Cowen is an economist, author of the blog Marginal Revolution, and a serious eater. He seeks to use his understanding of economics to zero in on the best food and best restaurants, and he shares what he's learned in a book called "An Economist Gets Lunch." Cowen is a fan of local food. But for the taste, not because he thinks it will save the world.

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STEVE INSKEEP, HOST:

It's MORNING EDITION, from NPR News. Good morning. I'm Steve Inskeep. Lynn Neary is in for Renee this week. Lynn, welcome to the program.

LYNN NEARY, HOST:

Good to be here.

President Obama is back in Washington this morning, after a weekend summit in Colombia. The gathering with leaders from throughout the Americas produced some agreement on trade and some disagreement on drug policy in Cuba.

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What the Taliban are calling the start of their spring offensive kept security forces across Afghanistan fighting throughout Sunday and into this morning. Officials say 36 insurgents were killed in Kabul and three other eastern provinces. Three civilians died in the attacks, and eight members of the police and army were killed. American officials are praising Afghan forces, but questions remain about how the insurgents were able to infiltrate the most secure parts of the capital. NPR's Quil Lawrence reports.

(SOUNDBITE OF CROWD CHATTER)

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LYNN NEARY, HOST:

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

STEVE INSKEEP, HOST:

And I'm Steve Inskeep. Good morning.

Over the weekend, tornadoes ripped through several states, killing at least five people in Oklahoma and causing millions in damage to communities. Among the hardest hit areas was Wichita, Kan., which has seen its share of hardship over the past several years.

How do you measure who is an effective teacher?

More states are wrestling with that question, now that the Obama administration is encouraging schools to evaluate teachers with a combination of student test scores and classroom observations.

The question of whether teacher evaluations are reliable indicators for teacher effectiveness has long been controversial. But New York City reignited the debate when it rated thousands of teachers with test scores alone — and then released those ratings to the public.

Jeff Jensen got interested in the Titanic when he was just nine years old. Later, his father bought him a replica of the ship that was made from 50,000 matchsticks.

Boudin is a Cajun specialty — sausage filled with rice, pork and herbs. And since Scott, La., is starting a Boudin festival, the state legislature crowned it the "Boudin Capital of the World." Nevermind there are two other Boudin capitals of the world. But Jennings, La., trumps them all. Years ago, it was crowned the "Boudin Capital of the Universe."

North Korea has failed in its attempt to send a satellite into space. U.S. military officials say the rocket broke apart shortly after launch on Friday.