The Virginia Tech Shooting...Why?

Why is our world like this. We should be able to go into a school or university, or whatever and feel safe because that is a learning environment where we should be at peace and to learn why things like this happen and how we can prevent them. Now, for the next question, how do we prevent tragedies like this from happening? The answer is not simple and would take some hard thinking to solve it. I believe that there may have to be tighter security, everywhere. First, we have to get the whole story, and the facts of the story to know how to judge. So, I will stop writing now and wait for more details to arise.