There is a rather large difference to having plans and dealing with an actual incident. Not to bicker, but a dedicated command room sounds like a fun plan but the opposite of what was needed in the incident described in this story.
Events like this are much more common than you may think, though rarely as severe as this shooting. From fires at retirement homes and even at an ED once, bus crashes, WWII bombs surfacing during construction, floods… it almost becomes routine. I can assure you the plans are not built not academics but are refined through experience. And in a weird way, disaster response almost becomes routine.
