Testifying before Congress, Paul Wolfowitz famously said that the Iraq War would pay for itself. People have since mocked him for this but, come on. He was only off by 2.4 trillion dollars.
To grasp the magnitude of this bad bit of estimation, consider this. You or I could have gone before Congress in his stead. And when they asked us how much the War in Iraq was going to cost, we could have picked any number between one and about 4.7 trillion at random…and we would have been closer than Paul Wolfowitz. They later made this man president of the World Bank.
2.4 trillion is a lot but don't sweat it. It's not like we have anything better to do with the money.