The fracking boom in America kicked off almost by accident. An engineer worried about losing his job kept experimenting until he hit on a technique that changed the world. Back in 1995, Nick Steinsberger was 31. He was working for an oil company called Mitchell Energy. And he had just gotten a promotion. He was put in charge of an area called the Barnett Shale. It was in central Texas. And the company had a bunch of natural gas wells there. A couple of months in, management called him in for a meeting.