If you look in recent places where they've banned guns.. (Australia) The crimes shot up immediately. And, not only that, but they shot up, a lot. You know why? Because like Lehsyrus said, the criminals knew that there was no way of the citizens protecting themselves, so of course they were gonna start breaking into homes, stealing things, and killing people. There's no sense in making guns illegal all together, and in all reality... Background checks in my honest opinion won't do much. As proven in incidents before, a perfectly normal kid. Honor roll his whole life, been a great person, worked community service, or at a shelter, but that kid could change in a heartbeat. Someone close to him could die, and he go insane, he could have a bad influence in his life, so that bad influence tells him to go kill 20 people, and so he does it. (Not that it's likely, but it's possible.)
There's a lot of things that can go wrong with a person, in a short amount of time, but overall if you've ever considered putting a ban on guns, you better be ready to start bring a knife to a gun fight, because there's no stopping people from getting guns, and as stated above numerous times... You could make an explosive with instructions off the internet for a measly 30 dollars.
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scotbud123, Are you really saying that you'd be okay with someone building a bomb that could possibly kill thousands of people, than rather have him get a gun and kill 20? If so, you must hate the human race, because if was like that, we'd be wiped out in no time.