So North Korea wants to test its missiles. May I suggest that they work with every other country that has nuclear warheads to head off an asteroid heading for Earth this September. It is the size of a playing field. I remember someone making that exact comment when describing a crater 1.5 km in diameter that struck America. It may have been the one that killed off the dinosaurs as dust and rocks filled the air.
We have to do something. We cannot rely on our dense air, it is too big and travelling too fast.
Should it be split into smaller pieces or will that create similar catastrophic events in several craters?
My first thought is a certain number of rockets fired to meet a certain point on the asteroid to deflect it. Mathematicians and scientists can work it all out. We could co -ordinate as we are unafraid of someone taking our technology as we are willing to share in the name of saving our planet.
Whatever, all countries need to meet and soon if we are to deflect it.