I don't speak to God much but today I'm saying a little prayer for the victim's families and for those young survivors whose lives will forever be affected. It's a difficult question to answer when it's a constitutional right to bear arms. Obviously gun registry won't solve the problem as the weapons used in the shooting were all registered. Here in Canada hunting is second nature to many but gun owners are limited to certain types of weapons. Most here grow up without guns in the household. Out of sight, out of mind I guess and if someone really wanted to do some damage, it would be difficult but it wouldn't be impossible. As OldArmy said above, "What do you want me to do that is different..." Christmas will now just be a sad reminder for many. What a damn waste.
Two things are infinite: the universe and human stupidity; and I'm not sure about the universe.