"Assault weapon" bans were in effect when Columbine occurred. How did that stop anything. A criminal doesn't care about the law. These laws are only to disarm citizens who have not violated the law. What is so hard to understand after all our street gangs buy their weapons from the Chinese military (they got caught a few years back bringing in shipping containers full of arms and ammunition to the point that our street games are considered the 6th largest standing army on earth. Does that sound like new laws are going the resolve the issues?