True story: when I was in Junior High, we had a kid make a pipe bomb, put it behind a water fountain mid day, and try to set it off. He was a dumbass and it just smoked a bunch, but they evacuated us, they called the bomb squad, they called the fire dept, and all the KC networks were there with cameras and stuff. I mean, the no evac is pretty weird unless they figured out almost immediately that it wasn't a real bomb and decided to make an example of a kid with regard to a bomb hoax. I am not saying it is racial, etc, but it could just be a school wanting to prove how on top of defending the school they are. Like the pop tart gun school.