News: High-tech ice cream
Summary: "Fresh" isn't usually a word you hear when it comes to ice cream. But technology is changing the way this good old-fashioned treat can be made. Instead of having dozens of vats of frozen premade flavors, one San Francisco ice cream parlor whips up your order while you wait. Sumi Das shows us the special machine and technique that turns the ingredients from liquid to an ice cream scoop in about a minute.