It is an unfortunate event. No child should have to witness what happened today. It is very saddening that a man could even do such a thing.
It is even more upsetting to think that this is the second event like this that has happened this year. Colorado, and now Connecticut. Such events are terrible.
I think things like this make us look at our lives even more, and realize that we are blessed to have this life... because at any moment it could be taken away from us by situations that are out of our hands. Just remember, don't take life for granted. Live life to the best of your abilities and love one another. Don't do evil things, but good.
James 4:14
"...whereas you do not know what will happen tomorrow. For what is your life? It is even a vapor that appears for a little time and then vanishes away."