Not much of a link, but afaik about as much of a link as it's possible to get between string theory and experiment.
So with all of this taken into account, what are your odds of dying in an asteroid strike in any given year? About 1-in-70,000,000.
So all-in-all I can assume I personally die from an asteroid strike about three times in 200M years while ignoring that the entire human species is wiped out twice.
And if I wanted the US Department of Transportation to handle this, based on personal risk to individual US citizens alone, they could spend about $30M a year on asteroid prevention.
The article sucks. It just says the risk is low and makes no attempt to compare the risk or the cost to anything else.