“Asteroid Impact:” What NASA Plans To Do If A Killer Asteroid Will Hit Earth!

There literally hundreds of thousands of Asteroids out in space, most are far enough away not to concern us on Earth. There are some Asteroids, however, that can come dangerously close. What if an Asteroid is detected to be on a collision course. What are NASA’s plans? What are they doing to find these Asteroids to give Earth as much time as possible to prepare?