I laughed my head off. I see that on some clients systems (depending on how you count the stats) either in 1 second, and certainly in one day. With a bit of luck they refer to very carefully crafted and directed attacks, not the run of the mill stuff than business face daily, because law enforcement is not that interested in combating cyber crime.
Apparently these threats can bring down air traffic control, the national grid and other critical systems. True, which is why these systems should be nowhere near the internet, should not have USB ports or CD drives, and also be tied down tighter than a very tight thing. They should be able to operate autonomously if their interconnections break, and then their communications should not be over the internet or lines of communications that could be compromised by a cyber attack.
All that is easy to say though, the problem with the internet though is that it is easy and cheap.