Upon stepping foot on the moon, Buzz remarked to Houston, 'Beautiful, beautiful. Magnificent desolation.'

I still say, 'Shoot for the moon; you might get there.'

My first biography written in '73 was not 'Journey To The Moon.' It was 'Return To Earth.' Because for me, that was the more difficult task - disappointment.

Exploring Mars is a far different venture from Apollo expeditions to the moon; it necessitates leaving our home planet on lengthy missions with a constrained return capability.

My expertise is the space program and what it should be in the future based on my experience of looking at the transitions that we've made between pre-Sputnik days and getting to the moon.

Some things just can't be described. And stepping onto the moon was one of them.