Newtown, CT Sandy Hook Elementary School Shooting

First off I'll start by saying this is a very tragic event that happened today December 14 2012. Now I hear everybody saying "ban guns" I would like to know how that will help so please leave a comment, I personally think teachers should be trained on situations like this an they should be armed AT school. My main reason for thinking this is most high causality shooting in the USA seem to happen in "gun free zones" please tell me why the criminals dont listen to this. Thats all I have for now but remember to keep everybody that was at sandy hook elementary in your thoughts and prayers.