Is Earth destined for another extinction-level asteroid event? | The Excerpt

Hollywood has long been enamored with end-of-the-world science fiction where asteroids play the leading role. But the reality is that asteroids did in fact lead to the end of the non-avian dinosaur era sixty-six million years ago. Could it happen again? How at risk is mankind and what steps are scientists taking to avert a potentially catastrophic collision? Robin George Andrews, author of "How to Kill an Asteroid," joins The Excerpt to discuss how scientists are working to literally save the planet.