When business was booming, Rusty George hired like crazy. Then, he had to lay off half his staff. Now the marketing executive is much more cautious about hiring, calculating the cost to add an employee down to how much more coffee he'll need to buy.

We all know what happens when individuals stop paying their bills. It's an onslaught of angry letters, pestering phone calls and bankruptcy paperwork. But what about when an entire country can't pay the bills? Argentina's default in 2001 is a nightmare scenario for lenders warily looking at Europe's crisis.

It's known as the Viagra of the Himalayas, and it can cost as much as $50,000 a pound. The world's most expensive fungus is known in Tibetan as yartsa gunbu and has become a status symbol in China.

Apple helped pioneer the use of computers in schools back in the 1980s with the graphical interface of the Macintosh. These days, it's the iPad that's the hot trend in education and Jobs' education legacy is growing with the popularity of mobile devices in the classroom.

The immigration issue is often debated in terms of justice, rights and the protection of our borders, but there's a business story to be told as well. The question is: Can the U.S. economy really function without undocumented workers?

It's haunted house season. Just who are these people who are willing to spend a whole month covered in fake blood, chasing kids in the dark?

Guy Raz talks to Beverly Gage, associate professor of history at Yale University and author of the book The Day Wall Street Exploded: The Story of America in its First Age of Terror, about the history of protests on Wall Street.

Steve Jobs helped build an iconic company and then transformed industry and popular culture, much like Thomas Edison or Walt Disney. They possessed qualities that set them apart from other tycoons of industry. Now that Jobs is gone, it may be decades before we see his like again.