It was challenging to understand what was necessary to successfully carry out all the training simulations that we, as crewmen, would experience, and make a very successful use of that training and education.

Everyone should take their hats off to Neil Armstrong. He is a humble guy who doesn't wave his own flag.

Monumental achievements by humanity should be done by major organizations as much together as possible.

We have the ability, at such high fidelity, to simulate the physical world through computers. But when the spiritual world or human behavior comes into play, we don't have a very good model for that at all.

As time goes by, I'm increasingly impressed by how very special and timely it was that we got the degree of national commitment needed to put people on the Moon. For the first time, this nation was united in trying to develop an interplanetary capability. We've been trying to repeat that situation ever since.

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

My own American Dream was to serve my country as best I could and make a difference in America - and in the world.