I felt pretty confident in relieving myself, since I had the urge.

Armstrong described the lunar surface as 'beautiful.' I thought to myself, 'It's not really beautiful. It's magnificent that we're here, but what a desolate place we are visiting.'

I was given permission to serve myself Communion, with wine and a wafer, on the surface on the Moon. But I was advised not to say anything about it at the time. Someone had strongly objected to the Apollo 8 crew reading from the Bible. We didn't want to get into any further trouble with the religious critics.

If you want poets in space, you'll have to wait.

It's been one of the greatest challenges that ever came along in my life; it was one of the more difficult things to do.

There's no doubt who was a leader in space after the Apollo Program. Nobody came close to us. And our education system, in science, technology, engineering and math, was at the top of the world. It's no longer there. We're descending rather rapidly.

Weve got to go [back to the moon]. But we dont want to stay too long. ... The ultimate goal is Mars.