They say if we needed to destroy and asteroid headed for Earth the fastest easiest way is witha nuclear bomb. If we used it it would destroy it but it would create thousands of pieces falling to Earth which would be much worse. In a special it was said that it would take a bomb on the order of 1,000 megatons to completly destroy an asteroid. It would not only be the biggest bomb ever built but it would need to be put on the biggest rocket ever built. My soloution could be simple. INstead of building one big bomb build about 10 smaller ones. launch 10 smaller nuclear warheads and attach them all to the asteroid. THen at the precise moment they all go off. SInce there would be 10 each one would be around 100 megatons. And since it not one concentrated into one place they would have a better chance of destroying all the asteroid. I think 100 megatons is well within our bombmaking capabilitites. If we make them light enough we could put 2 on each rocket only requiring 5 launches. This sounds easy and simple. Why hasn't anybody ever thought of this?