I hope I'm around for this.
I have a feeling, though, that by then we will have some pretty powerful particle beam weapons strong enough to detonate any threatening asteroid long before it got close. Heck, we might have that kind of weaponry in space already considering we developed atomic bombs over 60 years ago in the bronze age of technology.
We will save you.
The DemocRATS have been all over this "Star Wars" stuff.
Clinton cut funding for research to the bone. Face it, we are dooooommmmmmeeeeeddd!~