you're going to have parents flocking to the scene. so schools have an amazing amount of challenges along with their first responders to deal with parents coming right away, text messaging, misinformation, parent/student reunification, plus handling the actual incident itself so make sure they neutralize the threat. >> very briefly, what about magnetometers in schools? >> it sounds like a quick fix, but the devils are in the details of implementation. time and labor intensive. you can still get a weapon in. someone could come in clean, pass a weapon through a window, come in at night for a basketball practice at 6:00 in the evening, when they're not running, and plant something in the school and pick it up the next day after they got cleared. sounds good, sounds like a quick fix. the first and best line of defense is people. number one way we find out about weapons in schools is when a kid comes forward and tells an adult that they trust, whether that's a teacher, principal or school resource officer.