In a heist right out of movies such as The Italian Job, eight masked gunman drove on to the tarmac at Brussels' international airport Monday night, sped to a plane being loaded with diamonds and made off with about $50 million worth of the precious stones, authorities say.

It was all over in just a few minutes.

Investigators trying to piece together a motive in December's killings in Newtown, Conn., believe that 20-year-old shooter Adam Lanza may have been inspired by a similar 2011 massacre in Norway.

The Hartford Courant and CBS News report that authorities searching through Lanza's belongings after the shooting at Sandy Hook Elementary discovered several news articles about Anders Behring Breivik, who killed 77 people in Norway in July 2011.

South African prosecutors laid out their case Tuesday against sprinter Oscar Pistorius, charging that the Olympic and Paralympic athlete committed premeditated murder on Valentine's Day when he allegedly rose from bed, put on his prosthetic legs, walked to a locked bathroom door and fired through it four times — killing his girlfriend, model Reeva Steenkamp.

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RENEE MONTAGNE, HOST:

Good morning. I'm Renee Montagne. Congratulations to the Montalvos of Houston, Texas on the birth of their identical twins Ace and Blaine and on the birth of identical twins Cash and Dylan. The couple thought they'd hit the jackpot when they learned they were expecting twins. Then they heard fourth heartbeat. Quadruplets are unusual, but a pair of identical twins - the odds are about 70 million to one. Next? Possibly a family trip to Las Vegas. It's MORNING EDITION. Transcript provided by NPR, Copyright NPR.

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LINDA WERTHEIMER, HOST:

Good morning, I'm Linda Wertheimer.

Unknown hackers captured Burger King's Twitter account for more than an hour yesterday. They changed BK's bio, saying the company was sold to rival McDonald's because the Whopper had flopped. McDonald's sent the message: We didn't do it. The hackers did bring Burger King 30,000 new followers. BK recovered its account and tweeted: Interesting day.

It's MORNING EDITION. Transcript provided by NPR, Copyright NPR.

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There's been a debate raging in academic circles for years. Does having children really make one happier? Most parents say their kids absolutely make them happy, but some researchers have come to question that.

NPR science correspondent Shankar Vedantam sat down with MORNING EDITION's Steve Inskeep to take on this question.

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Hi, Shankar.

SHANKAR VEDANTAM, BYLINE: Good to be here, Steve.

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Hey, Mississippi can righteously proud of the part it played as the cradle of America's quintessential music, the blues. American music by way of Africa. One place in particular, Mali, has long laid claim to giving birth to the blues.

(SOUNDBITE OF MUSIC)

MONTAGNE: Here the legendary Ali Farka Toure.

Mali's musical tradition was threatened this past year when Islamist militants took over the vast deserts of Northern Mali and immediately banned music - an incredibly painful experience for Malians.

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OK. Let's stay with tablets, the digital kind. The kind we used to download apps. Our last word in business today is: apps aplenty.

LINDA WERTHEIMER, HOST:

With the popularity of tablets and smartphones, people have been downloading about 10 apps per month onto their devices.

MONTAGNE: Great news for businesses, perhaps, except research from the business consulting firm Nuance Enterprise shows that the vast majority of those apps are quickly abandoned, especially those that are free.

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Now, a look at one part of the immigration debate in Congress: a proposed increase in H1-B visas. Those are the visas that allow companies to hire skilled foreign workers. As NPR's Martin Kaste reports in today's "Business Bottom Line," offering more of those visas is controversial, especially among American tech workers of a certain age.

MARTIN KASTE, BYLINE: Here in Seattle, people still have fond memories of the 1990s tech boom.

UNIDENTIFIED WOMAN: Do you want a cup of coffee?