Why wouldn't an enhanced deterrent, a more stable peace, a better prospect to denying the ones who enter conflict in the first place to have a reduction of offensive systems and an introduction to defensive capability. I believe that is the route this country will eventually go.

Mars is essentially in the same orbit. Mars is somewhat the same distance from the Sun, which is very important. We have seen pictures where there are canals, we believe, and water.

The world is beset by challenges including the ongoing danger of international terrorism, and the significant political and economic threats posed by factors such as the high levels of corporate and sovereign debt and persistent unemployment.

They asked me to go in front of the Reagans. I'm not used to going in front of President Reagan, so we went out behind the Bushes.

Who would have predicted... that Dubcek, who brought the tanks in in Czechoslovakia in 1968 is now being proclaimed a hero in Czechoslovakia. Unbelievable.

For NASA, space is still a high priority.

I just don't believe in the basic concept that someone should make their whole career in public service.