Beginning of Essay
When it comes down to developing a way to defend the entire planet from destruction I am all for it. A large asteroid or comet hitting the earth is not a common occurrence. But it has happened many times before and when it does happen again the asteroid may wip ....

Middle of Essay
.... defense system, I think that our government should look into constructing one. When one thinks about what an asteroid could do to our planet it is usually a very scary thought. In the past we have been very lucky with where asteroids have hit our earth. Back in 1908 in the Tunguska region of Siberia, an object from space hit there causing miles of forest to be devastated. If that same object had hit New York, it would have probably been like a 20 megaton bomb going off in Times Square. That would have completely altered history. What makes it worse is that it is thought that a small comet hit in Tunguska. What if a huge comet had hit ....