By preventing dangerous asteroid strikes, we can save millions of people, or even our entire species. And, as human beings, we can take responsibility for preserving this amazing evolutionary experiment of which we and all life on Earth are a part.

Asteroids have hit the Earth millions of times. We can see them as shooting stars every night. When they get bigger, things get complicated. It is only a matter of time until a big one hits us. And since we can do something about it, we should.

While we didn't know the dinosaurs personally, we do know that they were wiped out by an asteroid impact.

It would take an extremely large spacecraft to deflect a large asteroid that would be headed directly for the Earth.

If we do our homework right, never again should an asteroid that can do damage on the ground impact the Earth. We're living in a time-with our technology-we have the capability to eliminate that major shaper of evolution . . . the evolution of life on this planet.

There's no accepted global policy on what to do about asteroid impacts.

We not only need to train people, we also need to develop deflection technologies.