It has been a tragedy, the most horrible thing any family can go through. The problem is not the guns, but the fact that a mentally unsound man with some big issues was able to get his hands on them. This is further complicated by the fact that I don't think he had any prior history of violence (not that has come to light yet any way) Who knew or could have anticipated that he would go off like this and do such a terrible thing? As the son of a teacher he would have been let in. Nothing short of a metal detector could have made a difference. Sometimes people just snap and there is only so much that can be done.
The one thing I think could be improved is for teachers to be able to lock the doors from the inside. They had to reach their hands out with their keys, reach around the door, lock it and pull it shut because it only locks from the outside. They need to be able to lock the doors from within.
I feel like it's best to honor the acts of heroism- The kids that protected each other, the teachers who hid them in the closets, the janitor who ran down the halls shouting for everyone to get down and the principal who gave her life when she lunged at the gunman.