When Facebook goes public this week, the company will be valued at roughly $100 billion.
It will be the highest valuation ever for an initial public offering of a tech company. Is Facebook really worth this much money?
One way to frame the question is to consider a single fraction.
The number on top of the fraction is the total value of the company. The number on the bottom is the company's profits over the past year. This fraction is called the price-to-earnings ratio. It's widely used by investors in stocks.
Francois Hollande stands up in his car Tuesday as he rides up the Champs-Elysees after taking the oath of office as the new president of France. Shortly afterward, he flew to Germany to meet with Chancellor Angela Merkel and discuss the continent's economic woes.
As soon as new French President Francois Hollande was sworn in on Tuesday, he observed a postwar custom and reached out to Germany, in a move intended to underscore European solidarity and the importance of the alliance.
But it wasn't a relaxing social visit. Hollande's plane was struck by lightning en route to Berlin and had to return to Paris as a precaution. He then took another plane.
Carlos Fuentes, one of the most prolific and best known Spanish-language authors, has died. His death was reported on Twitter by Mexican president Felipe Calderon. The Mexican daily Reforma, which Fuentes often wrote for, reports the author died after experiencing heart problems.
He was 83.
"I am profoundly sorry for the death our loved and admired Carlos Fuentes, writer and universal Mexican. Rest in peace," Calderon wrote on Twitter.
Living in the middle of a natural gas boom can be pretty unsettling. The area around the town of Silt, Colo., used to be the kind of sleepy rural place where the tweet of birds was the most you would hear. Now it's hard to make out the birds because of the rumbling of natural gas drilling rigs.
The land here is steep cliffs and valleys. But bare splotches of earth called well pads are all over the place.
"That's the one I'm worried about because it just went in," says Tim Ray.
Despite the multiple layers of security at airports, terrorists still often target planes. But terrorism analysts say they are also concerned about soft targets. Here, a Transportation Security Administration agent looks at an identity card at the Portland International Airport earlier this month.
Credit Rick Bowmer / AP
Army National Guard officers patrol Grand Central Station in New York on Sept. 10, 2011, the day before the 10th anniversary of the Sept. 11 attacks.
NATO has just asked the Pakistani President Asif Ali Zardari to attend the May 20-21 summit in Chicago. The AP says the overture signals that the rift between NATO and Islamabad may be coming to a resolution.