Costly, no doubt. But, its "crazy" effective. Prisons , the congress, the senate, government installations, the pres, billionares, dignitaries all have armed guards and any attcks on them are really low percentage, not zero, but pretty close. If you guys get guards; why cant my kids' school have one. I surley dont want cops at every school but the govt. loves to protect us from ourselves and this seems right up their alley. And since we are now putting killing people in a buisness model maybe the govt. has the expert advice on this.