Stop the killer rocks

In this article the author discusses why the U.S. National Aeronautics & Space Administration (NASA) should work with other national space agencies and private organizations to create a program that would ensure no destructive asteroid collides with planet Earth. He argues that asteroids may seem like a distance threat, but the hazards are real. He notes that the history of life on Earth has been shaped by asteroid impacts and discusses the importance of prediction in preventing collisions.