Nice catch, 2x6. "Mercenaries" is obviously not the correct word. Maybe "Fu*k!ng scum" would be better?
The school disaster in Russia has really opened my eyes to new possibilities. What was that great quote from Rumsfeld? Something like, "There are known knowns..., known unknowns... and unknown unknowns..."? Massacring school children in huge numbers would have to fall in that last category - until now. How could rational people anticipate an attack like that?

Out here in California we have one cop at almost every high school, but even if you had four or ten there is simply nothing to prevent the same thing from happening here. I'm not trying to spread panic, but we have lots of reasons to be very concerned about the enemies who have been attacking us for the past 30+ years.
I wonder which one of those geniuses came up with that idea, "Hey let's murder some schoolkids, that will show 'em".