NASA concept video shows how we might save Earth from rogue asteroids

We've all seen those blockbuster movies in which scientists lay out complicated, risky plans to save Earth from an incoming asteroid. And those plans are almost always dependent on a bit of luck.  But what would really happen in real life?  NASA thinks it has an answer, and the space agency demonstrated that solution in a concept video (below) posted on Friday.  SEE ALSO: This is how NASA spots potentially dangerous asteroids near Earth The video shows NASA's Double Asteroid Redir