That's $2Billion dollars, and T. Boone Pickens has lost that in the last few months. He can afford it, but that doesn't mean he likes loosing money. He also knows based on his perseverance, that he will get the $2B back, and probably earn more.
I don't like his politics, and what he did to John Kerry with his lies of Swift Vote campaign. But he may have changed for the better with his Wind farms.
What I like about him and almost all Entrpreneurs is that they don't give up, especially when their chips are down. They just drill in another hole, becausing knowing that they will strike gold in one of those drills.