I found the contents of this very interesting:
Accordingly, it would seem to be reasonable for those in charge of our safety to inform the public about how many airliners would have to crash before flying becomes as dangerous as driving the same distance in an automobile. It turns out that someone has made that calculation: University of Michigan transportation researchers Michael Sivak and Michael Flannagan, in an article last year in American Scientist, wrote that they determined there would have to be one set of September 11 crashes a month for the risks to balance out. More generally, they calculate that an American’s chance of being killed in one nonstop airline flight is about one in 13 million (even taking the September 11 crashes into account). To reach that same level of risk when driving on America’s safest roads — rural interstate highways — one would have to travel a mere 11.2 miles.
Aw come on! You have to keep the insurance business, auto-mechanics and scrapyards in business. Never mind undertakers. They all contribute positively to the economy. Probably more so than the DHS.