If you can nudge an asteroid out of our way, you can steer one into our way as well.
And with no nuclear fallout, it may seem a more desirable weapon than a nuke.
You must have a great deal of trust in whoever learns to do this, but once the genie is out of the bottle, you also have to trust whoever else gets this capability.
If we developed the ability to use asteroids as a weapon... there is no doubt we’d sell the technology to third world countries.....
” you also have to trust whoever else gets this capability.”
very good point.