Every couple of years, we could dispatch people from Earth to Mars.

The first human beings to land on Mars should not come back to Earth. They should be the beginning of a build-up of a colony/settlement, I call it a 'permanence'.

Mars is the symbolic and totally stimulating next objective that could so dominate the next century's exploration efforts. From Mars, the resources of all the asteroids will become readily available.

In Mars, we've been given a wonderful set of moons where we can send continuous numbers of people.

Not everyone will understand this need for America to lead the world in space.

Having walked on the Moon, I know something about what we need to explore, really explore, in space.

The way I see it, what is going to come out of the moon activities is a respect for U.S. leadership.