 Well, a week before the flight on Apollo 13, I catch the measles and exposed everybody to measles. And everybody had the measles as a kid, except for Mattingly. And the doctor says, he can't go. He's going to get the measles at the moon. Well, he never did, but they convinced management to pull him off. So they, a week before the flight, Mattingly got jerked off the prime crew and Jack Schweikert took his place. And, uh,