For the first time in years, the Obama administration appears to be focused on shuttering the Guantanamo Bay prison and – at a minimum — has redoubled its efforts to reduce the number of people held there.

The key, officials familiar with the administration's thinking say, may lie with 56 Yemeni detainees, a group of men who have been at the island facility for more than a decade though U.S. officials cleared them for transfer years ago.

"If we can send the Yemenis home," one official said, "that could get the ball rolling."

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This is ALL THINGS CONSIDERED from NPR News. I'm Melissa Block.

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From NPR News, it's ALL THINGS CONSIDERED. I'm Melissa Block.

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I'm Robert Siegel. Some big numbers are being thrown around in Silicon Valley today. This morning, Yahoo CEO Marissa Mayer announced that Yahoo is buying Tumblr, a social media and blogging startup. The price, $1.1 billion and that for a site which last year earned a tiny fraction of that amount in revenue.

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Boeing's 787 jetliners are returning to the skies. Four months ago, the entire fleet was grounded following serious battery problems on two jets, but the batteries have now been redesigned. Planes have been retrofitted, and airlines are beginning to put them back into service. Today, United Airlines, the only U.S. carrier flying the 787, put two of them back into service. NPR's Wendy Kaufman reports.

(This post was last updated at 11:45 p.m. ET.)

A massive tornado ripped through the southern suburbs of Oklahoma City, Monday afternoon, killing at least 51 people, according to the state medical examiner's office.

The death toll was expected to rise.

Helicopter images showed large tracts of Moore, Okla., completely leveled by what the National Weather Service says was at least an EF-4 tornado with winds in excess of 166 mph. The tornado stayed on the ground for 40 minutes and traveled 20 miles.

Microsoft hasn't exactly had a great couple of years.

Its new Windows 8 operating system was held responsible for the drop in PC sales last quarter. Sales of its Windows Phones lag far behind both the iPhone and Google's Android phones.

The light in the darkness for Microsoft has been the Xbox 360, which has been the top-selling game console for over two years — beating out both the Nintendo Wii and Sony's PlayStation. On Tuesday, Microsoft is expected to announce a new version of the Xbox.

Yahoo's $1.1 billion purchase of Tumblr could be considered a bargain compared with its other big-dollar bets. The company's history is dotted with pricey purchases of once-hot Web properties that had more promise than eventual purpose. A look back:

GeoCities, 1999: $3.7 Billion