How Danny Meyer turned Shake Shack into a $600 million burger empire

It's hard to think of a bigger restaurant success story over the last decade than Shake Shack. The high-end burger chain began as a hot dog cart in 2001 in New York City's Madison Square Park by famed restaurateur Danny Meyer. But there's so much more to this story. He once spent $1 million developing a line of French fries only to throw them away. If Danny Meyer is the heart and soul of Shake Shack, its CEO Randy Garutti is the engine that powers it. Here's how they built Shake Shack.