Mitt Romney won Puerto Rico's Republican presidential primary Sunday, adding the commonwealth's 20 delegates to his commanding lead over the other candidates as they compete to reach the 1,144 needed for the nomination. Rick Santorum hurt himself with the island's voters by saying English had to become its official language before it could achieve statehood.

Good morning.

Our early headlines:

-- Killing Of Fla. Teen Trayvon Martin Becomes National Story About Race.

-- Apple To Buy Back $10B In Shares; Pay Dividend Of $2.65 Per Share.

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STEVE INSKEEP, HOST:

NPR's business news starts with Apple's giant pile of money.

(SOUNDBITE OF MUSIC)

INSKEEP: The maker of iPads, iPhones and computers is sitting on almost one hundred billion dollars in cash and securities. And today, Apple announced that it will spend some of that money paying a stock dividend to shareholders and buying back some company stock. NPR's Steve Henn has been following developments, and joins us on the line from Silicon Valley. Steve, good morning.

STEVE HENN, BYLINE: Good morning.

The Associated Press just moved this alert:

"Apple says it will use its cash to start paying dividend of $2.65, buy back $10B in shares."

Here are some of the latest developments concerning the March 11 killings of 16 civilians in southern Afghanistan and the U.S. Army staff sergeant, Robert Bales, who is suspected of carrying out the massacre:

-- Defense attorney John Henry Browne will today "have his first face-to-face meeting with the 10-year Army veteran, who is being held in an isolated cell at Fort Leavenworth's military prison in Kansas," The Associated Press reports.

Now that 911 recordings show how a white Florida man continued to follow a 17-year-old black boy even after police advised him not to — and captured the sound of the man killing the unarmed youth with a shot to the chest — Trayvon Martin's family wants the FBI to take over the investigation into his killing.

The gunman says it was an act of self defense during a Neighborhood Watch patrol.

There are fears in France today that the killings of at least four people outside a Jewish school in the city of Toulouse are linked to earlier murders of three soldiers and that the victims were targeted because they belonged to ethnic or religious minorities.

One in every four Americans receives their news digitally from mobile devices, which are helping to expand the consumption of journalism across multiple sources, according to a new report released Monday.

The 2012 State of the News Media Report, conducted by Pew Research Center's Project for Excellence in Journalism, provides an in-depth examination of how Americans read news as their consumption habits transition from the printed form to the digital.

Four years since they first began making music together, the Brooklyn-based duo Tanlines is finally releasing an album: Mixed Emotions, out tomorrow. The band is Eric Emm, who sings and plays guitar, and Jesse Cohen, who plays drums, keyboards and an assortment of electronic instruments. Cohen is also the chattier of the two.

"We use a lot of different drum kits that are in a computer," Cohen explains. "We also play a lot of stuff live, and a lot of time you can't really tell which is real and which is fake. That's sort of a thing that we like to play with."