 And because he was so smart and he said, well, I'd like to think about it. But he did. And he was there for 41 years. He's the longest serving professor in the history of MIT. He used to tell me about nuclear many years ago when I was a little boy. He said, someday you'll have a bomb that can do destruction the likes of which nobody could even imagine. And I won't tell you what he said in terms of the power, but he would say just that. And then he'd go into some more details. And I said,