The Libyan government has given armed groups until Tuesday to disarm and depart from the capital. But the deadline is unlikely to be met. It's indicative of the wider problem in Libya where anyone with a uniform and a gun can say they are in charge.

House Republicans are rejecting a bipartisan compromise approved overwhelmingly by the Senate Saturday. The deal would have extended the payroll tax holiday and unemployment benefits through February.

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RENEE MONTAGNE, HOST:

It's MORNING EDITION from NPR News. I'm Renee Montagne.

LINDA WERTHEIMER, HOST:

And I'm Linda Wertheimer.

It's not clear how the death of North Korean leader Kim Jong Il will affect nuclear talks. Just ahead, we'll explore the concerns about the power transition in the secretive communist state.

In 1989, Vaclav Havel led the Prague Spring, the popular revolution that brought an end to Soviet domination in Eastern Europe. Havel went on to be Czech president for 14 years, a role that, as an artist, he says he never felt completely comfortable in. He was 75.

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Of course, people share more than just information. Some cities offer car sharers or bike sharing services. And today's last word in business is: tie share, as in neckties.

A year ago, former IBM consultant Zac Gittens and his friends realized they could expand their professional wardrobes by pooling their resources.

New websites make it easier for people to share not just thoughts, but things like music, photos, favorite recipes and magazine clips. Linda Wertheimer talks to Sree Sreenivasan, digital media professor and dean of student affairs at Columbia Graduate School of Journalism, about notable social media tools that cropped up in 2011.

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NPR's business news starts with a big investment in micro-blogging.

(SOUNDBITE OF MUSIC)

MONTAGNE: The Saudi Arabian prince Alwaleed bin Talal is investing $300 million in Twitter. The man Time magazine calls the Arabian Warren Buffett says he looks to invest in, quote, "promising, high-growth businesses with a global impact," like Twitter.

On March 11, 2004, al-Qaida-inspired bombers killed nearly 200 Madrid commuters on rush-hour trains. It was Europe's worst act of Islamist terrorism, and it came just three days before an election that Spain's conservatives were expected to win.

The government quickly blamed the attack on Basque separatists, but hours later, it became clear that it was Islamist militants.

"It got people mad about the government," says political scientist Jose Ignacio Wert.

The evidence of America's obesity epidemic is all around us. But the problem is particularly acute among African-American women.

About half of African-American women in the U.S. are obese, compared to 30 percent of white women. Black women not only carry more weight, but they start piling on extra pounds years before their white counterparts.

So when does it begin, this excess and unhealthful weight? Research suggests the problem starts early, and it may have a lot to do with when girls give up regular exercise.