I recently read an interesting [well I think so anyway] article on the Discovery website. The author [a Mr. Ian O'neill] gives a bit of information about using nukes to save the world from an extinction event. What extinction event? Well a roaming "kill all life on Earth" asteroid of course. I've placed an ad for one of my favorite asteroid doomsday books in this post just in case someone is inspired to give it a read.
Mr. O'neill's article is interesting and a little bit funny. So enjoy, if you like that kind of thing.