What is it, I wondered, that makes a man willing to sit on top of an enormous Roman Candle, such as a Redstone, Atlas, Titan, or Saturn rocket, and wait for someone to light the fuse? I decided on the simplest approach possible. I would ask a few of the astronauts and find out - The men had it. Yeager. Conrad. Grissom. Glenn. Heroes. The first Americans in space - battling the Russians for control of the heavens, putting their lives on the line. The women had it. While Mr Wonderful was aloft, it tore your heart out that the Hero's Wife, down on the ground, had to perform with the whole world watching. "The Right Stuff". It's the quality beyond bravery, beyond courage.