[randog]

...a 20 ton spacecraft could sufficiently deflect a typical 200 meter in diameter asteroid if given a lead time of 20 years.

Hmmmm...I hadn't thought about up-time of the spacecraft. Twenty years is a long time to keep something running continuously with no maintenance in a very hostile environment.

[captain anode]

Worried about asteroids! With heads so far up the as'roid garden they will never see one coming!

If we pay for this BS, I quit!