There is no logic in the argument against guns. This same shooter could have easily hijacked a bus full of people and drove it off a bridge. Would we then have sensitivity towards mass transportation, especially buses. There are a million arguments like that, baseball bats, melee weapons, etc.....

I do not agree with some of the statements that this guy was crazy, a bit deranged and misplaced perhaps. He knew exactly what he was doing. IMHO, he snapped. I would be willing to bet that there are hundreds of these guys born everyday under the pressures and confusion of what the hell is going on in the world today. No justification by any means. Everything I have read about this guy, he is intelligent. Again, not trying to put the guy on a pedestal. My point is, screening people for the point in which they snap is going to be quite difficult.