I know of no gun that up and walked itself into a building and began shooting, reloading and shooting some more by itself. That being said, it is a certainty that without the gun attached to the hand of the person doing the shooting there would be far less carnage in this world.Seung-Hui Cho was a well prepared assassin ten days ago. He was prepared to shoot at least one round every three seconds for as long as he was the only armed person in the building. I know, I know, wouldn’t it be just ducky if we had a concealed weapons law so that students or professors or the butcher, the baker and the candlestick maker could have shot Cho before he did more damage. Or would that just lead to more carnage? I suggest the latter. The more guns the more gun violence. Cho would not be deterred by the fact that some bozo carried a weapon in his pants, around his ankle, or under his jacket. It would just have made the situation more interesting for him. He knew he was going to die anyway the cake was sliced.
The real question is why did the cops take over 5 minutes to enter the building. The Tribune article points out that since Columbine the police policy is that the first 4 officers that arrive on the scene of a mass shooting wait for nothing and storm in. Since Cho killed himself at the first recognition that the police were in the building think about how many more lives could have been saved if the armed police wearing body armor reacted more quickly. This speaks to the need for more and better training of university police forces as they would be the first responders to this type of crisis when it happens again.