Well, it always was, of course, but now it seems we have the first fatalities related directly to a control system cyber failure.
See the story from Wiredhere.
Note that our own Joe Weiss is one of the key sources for the story. Nice to see a home boy making the big time.
Also, click over to Joe's Unfettered blog right here at CG.com to read more about the knotty--and critical--problem of control system security.