We live in a free society. Tragedies are going to happen. Those of you willing to lose freedom to stop what can not be stopped are either to emotional or to stupid to understand what you are proposing. Unbelievable the things people will support because of a tragedy that probably could not be stopped no matter what we do. You would lock people up because the behave different then you, you would strip protections promised in the Constitution to prevent the unpreventable. Step back and LOOK at what you are willing to sacrifice because of a tragedy that will happen again at some point no matter what steps you take.