Yes, but why use kids for the training? Why not take half of the police force and use them as background actors? The way I see it, it's a move to emphasize the fact that these bad guys are always waiting, and that everyone should be prepared at all times to succumb to the state will or else bad guys will surely kill them. How come in war games tanks don't come down city streets and fire paintballs at local businesses? Because it's not anything local civilians should worry about unless it's actually happening. Don't forget, the U.S. wasn't even originally supposed to have a continuously maintained army except in times of war... do you think we would have invaded Iraq so callously and without any meaningful debate if we would have to raise an army from scratch? The main point is to reinforce the feeling that armed forces are needed at all times to keep an eye on everyone.