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

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

Exploration is wired into our brains. If we can see the horizon, we want to know what's beyond.

From the distance of the moon, Earth was four times the size of a full moon seen from Earth. It was a brilliant jewel in the black velvet sky.

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.

We need to have people up there who can communicate what it feels like, not just pilots and engineers.

The final frontier may be human relationships, one person to another.