Morning Edition from NPR

Alabama and Mississippi are holding Republican primaries on Tuesday. The contests are vitally important for the candidacies of Newt Gingrich and Rick Santorum. Mitt Romney arrived in Mississippi Thursday night for a rally, and he has a pair of events in Mississippi and Alabama Friday.

Iranians have agreed to meet with Western officials to discuss their nuclear program, amid increasing Western concern about its purpose. Steve Inskeep talks to Paul Pillar about his article in The Washington Monthly entitled "We Can Live with a Nuclear Iran." Pillar teaches in the security studies program at Georgetown University.

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STEVE INSKEEP, HOST:

It's MORNING EDITION from NPR News. I'm Steve Inskeep.

Back in January, Navy Seals rescued an American aid worker who was held for months by Somali pirates. That moment shone a spotlight on the U.S. military's newest regional command - Africom, the U.S. Africa Command, which was created in 2007. One of its biggest concerns is dealing with terrorist groups such as al-Qaida and its regional affiliates. Renee spoke with the head of Africom, General Carter Ham.

RENEE MONTAGNE, HOST:

Good morning.

Here's the secret of the modern dairy farm: The essential high-tech advances aren't in machinery. They're inside the cow.

Take a cow like Claudia. She lives at Fulper Farms, a dairy farm in upstate New Jersey. Claudia is to a cow from the 1930s as a modern Ferrari is to a Model T.

In the 1930s, dairy farmers could get 30 pounds of milk per day from a cow. Claudia produces 75 pounds a day.

To appreciate a cow like Claudia, you have to know where to look.

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STEVE INSKEEP, HOST:

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RENEE MONTAGNE, HOST:

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Here's a stunning fact we came across as the anniversary of Japan's tsunami and nuclear disaster approaches. Of Japan's nuclear plants, only two of 54 reactors are currently active one year after the disaster. To talk about the implications of this, we've called Kenneth Cukier. He is Tokyo correspondent for The Economist magazine. He's on the line.

Welcome to the program.

KENNETH CUKIER: Hi, there.

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NPR's business news starts with allegations of price fixing on e-books.

The Justice Department is threatening to sue Apple and five major U.S. publishers for allegedly colluding to raise the price of digital books. The Wall Street Journal reports that Apple persuaded publishers, including Harper Collins, Penguin and Simon and Schuster, to change how they price their e-books before the launch of the first iPad in 2010.

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Private creditors holding Greek bonds have until the end of today to participate in the largest sovereign debt restructuring in history. This means creditors must exchange the Greek government bonds they now hold for new ones that are worth far less. Some creditors are balking, since it means up to a 70 percent loss on their returns.

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And we turn now to a group of people worth almost as much as a small country. Today's last word in business goes to Forbes magazine, which has released its 25th annual billionaires list.