I bet some of you are SAYING "OMG Guns are bad we can't have more people using them!" Well let me prove my case.
Who will get there faster? You or the Police?
In an event where there is someone attacking you or your loved ones, whos going to get there quicker? You or the Police? Now I'm not saying "Go put yourself in danger and go after the guy" I'm saying if the danger finds you you are better prepared to defend yourself and love ones.
Less Crime
Yes, believe it or not, more open and conceal states would lessen crime. Someone who wants to steal something from you would want to live long enough to either sell it or use it. Now, if that person is in an open/conceal state, what are the chances of you having a gun? The would be thief wouldn't know if you have one, so he wouldn't try to steal it so he wont risk his life.
Save lives
Someone is in your house and is trying to cause you and your family harm, now you called the police and the dispatcher said the cops will be there between 15-30 mins. Now you have a gun and the intruder is coming up the stairs. The cops haven't come yet and you need to protect your family.
this should help a little
Now, to help stop people from causing mass murders, before purchasing a gun, the buyer should turn in a recent medical form to show that they don't have any mental illnesses. While it wont stop the people who are mentally fit but still want to cause harm that well, most shootings are from people who are mentally impaired.
Plus a class to educate people who to protect themselves and the proper use of a gun and what you can do and not do with a gun. And you'll have to provide proof that you passed before purchase
[Edited on 12.14.2012 5:14 PM PST]