and astronaut alan b. shepard, lieutenant commander united states navy enters the mercury space capsule that he hopes to ride into space with the hopes of america riding with him." "they close the door and they go -clam, you know and they lock her up and from then on the tension starts rising and rising. it's just palatable. you could cut it with a knife." "the countdown was so long we wondered if it was ever going to get going ... he was up on the spacecraft for something like five hours." "i don't think anybody could breathe. there was no talking. there was nothing." "we had a guy that couldn't sit down at his console there. he just couldn't get it so they had to hold him and take him off and somebody else took his place in the last 30 minutes. the tension just got to him." "roger, ready to resume the count - s-t-e, i'm going to turn it over to stoney - ok stoney take it over." "five, four, three, two, one, zero." "five, four, three, two, one, zero." "roger, lift off and the clock has started." "fuel is go, four