 They flew that mission, the astronauts, NASA, everyone involved, flew that mission thinking the odds of success were 50-50. But they did it anyway because they wanted to win the race to get to the moon. We're going to come back in a moment with Robert Zimmerman, our space historian, and take phone calls about things in space. Jump aboard. I've got a few more questions for him. Then we'll take your calls on Coast to Coast AM.