As time begins to reveal the true scope and causes much discussion will ensue about how to protect public buildings in the U.S. from this type of incident. Imagine a mentally unstable individual, dressed in camo or black fatigues, with a bullet proof vest on, armed with several weapons, gaining entry into any public building...determined to do harm. What really must we do to protect many from the one or two? This happens so quickly that even with armed officers on the premises, tragedies like this will happen.
I don't even pretend to have any prevention answers but the answer is not in gun control. We are well beyond that and this is more about people control. The real prevention must come at getting better at hearing and heeding the warning signals that may have preceded this and other tragedies. Threats, notes, comments, texts, tweets and other communications often precede such events and foretell that "something" is going to happen. Prevention is pro-active and requires investing time and resources. But it may be our best hope. Although I realize, there is no real way to totally prevent this from happening ever again. And likely it will. So, so sad.
My "parental" heart goes out to all those families who are grieving the very pre-mature loss of their children as well as those who have lost adult victims in this tragic event. CNN is reporting "closer to 30 killed at school" but it is still unfolding and the victims families are in the process of hearing for the first time that their child won't be coming home.
Let us not look back in anger or forward in fear, but around in awareness. 
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