1. A system to track "anything larger than a certain size"(tm) moving within out solar system and within "a certain maximum amount of time"(tm)
2. A reliable way to deflect/destroy "anything larger than a certain size"
3. A system to implement that way within "a certain maximum amount of time"(tm) available 24x7
4. The same as above multiplied by 2 or maybe 3, just in case.
It would take not less than 100 or 200 years, just to reach the agreement about who is going to look into it.
This is another side-effect of the shutdown: online media theft.
surfing the net or checking email [...] reduces concentration
Surfing the net or checking email defies concentration.