With our present knowledge, we can respond to the challenge of stellar space flight solely with intellectual concepts and purely hypothetical analysis. Hardware solutions are still entirely beyond our reach and far, far away.

It was very successful, but it fell on the wrong planet.

If we continue at this leisurly pace, we will have to pass Russian customs when we land on the moon.

Conquering the universe one has to solve two problems: gravity and red tape. We could have mastered gravity.

We can lick gravity, but sometimes the paperwork is overwhelming.

My friends they were dancing here in the streets of Huntsville when our first satellite orbited the Earth. They were dancing again when the first Americans landed on the Moon. I'd like to ask you, don't hang up your dancing slippers.

With our present knowledge, we can respond to the challenge of stellar space flight solely with intellectual concepts and purely hypothetical analysis. Hardware solutions are still entirely beyond our reach and far, far away.