alt Hacker News>That has happened exactly once.
And affected an area about the size of half the continental US, causing expensive countermeasures to be taken for 40 years and counting.
Maybe once was enough?
>That has happened exactly once.
And affected an area about the size of half the continental US, causing expensive countermeasures to be taken for 40 years and counting.
Maybe once was enough?
Care to document what expensive countermeasures are nowadays being taken in the area the size of half the continental US?