Nobody likes making mistakes, especially when there’s money on the line. Even mistakes costing as little as fifty cents can be pretty darn frustrating, so imagine how you’d feel if you had made one of the most expensive mistakes in history. These people made mistakes costing thousands, millions, and even billions of dollars, and some of them even cost people their lives. From causing horrible disasters to disastrous corporate mergers, expensive mistakes come in all shapes and sizes. We’re counting down to the most expensive mistake in history, so hopefully whatever you’ve fudged up lately won’t seem so bad in comparison.