E shows us that the kind of emergency that was redefined to no longer be a top priority had previously been very common. The author is not saying that the actual types of emergencies have changed, only that they redefined what is and what is not a top priority. That is, previously, maybe there had been 200 emergencies a year that were top priorities, 100 HA/S, and 100 GW/E. What the author claims happened is that they changed the definition to only include the HA/S. This does not mean that the GS/E did not happen, only that they are classified differently now.