Re: Hit the US?
so that lots of smaller pieces of metal can hit them instead.
The smaller pieces at that speed will simply burn up in the atmosphere.
A random shaped piece up to 1kg in size has practically zero chance to survive re-entry. A piece > 100kg coming in at Earth orbital velocity has a significant chance of reaching the surface. Something approaching a ton will pretty much hit the ground unless it breaks up in-flight.
So whacking it with one of the precious "mid-course" interceptors - the ones that miss 10 out of 10 is the only chance of making sure it does not hit someone on the head.
This is something which is possessed by 3 nations - USA (demonstrated), China (demonstrated) and Russia. Russia except bits of Caucasus is outside the impact zone so it is giggling and twiddling its thumbs. China is being Chinese. That leaves the USA to do the job. I am surprised they have not done it so far purely for show-off purposes.