National and World News from NPR

Update at 4:39 p.m. ET. $28 To $35:

The AP reports that Facebook has set a price range for its initial public offering between $28 and $35.

The AP adds:

"At the high end, this could raise as much as $11.8 billion. That's much higher than any other Internet IPO in the past, even Google Inc. in 2004."

Artist Candy Chang turned the wall of an abandoned house in New Orleans into "a giant chalkboard where residents can write on the wall and remember what is important to them."

And since putting up that public art project in February 2011, "Before I Die" walls have spread to at least 19 cities around the world. Friday, a wall goes up in Denver.

Democrats keep getting dinged by media fact checkers for attacking Republicans for allegedly wanting to strip money from preventive health programs to pay for to keep the interest rates on some student loans from doubling this summer.

But that hasn't stopped progressives from continuing to make the claim. The latest comes in a new full-page MoveOn.org ad in Politico. The ad reads in part:

College seniors graduating in 2012 face a sluggish economy, bleak job prospects and a mountain of student loan debt. To make matters worse, many don't have the first clue about how to manage their personal finances.

Author Zac Bissonnette, a recent college graduate himself, learned how to handle money by watching his parents' mistakes and ignoring most of their advice. He put himself through college without loans, scholarships or help from his parents.

Can a helmet protect you in a tornado?

The Centers for Disease Control and Prevention says there's no research on how effective helmets are in preventing head injuries during tornadoes.

But, in what looks like a first, the agency says, in effect, that it's not out of the question that they might help.

Last year, tornadoes claimed the lives of more than 500 people in the U.S. Some safety advocates say protecting your head with a sturdy helmet could help reduce injuries and deaths.

Syrian security forces stormed Aleppo University today, killing at least four. The incident underlines the continued violence in the country and signals that the unrest is spreading to cities that had remained peaceful.

Reuters reports that security personelle were joined by students wielding knives to attack a protest calling for the ouster of President Bashar Assad. Reuters reports: