Well said, Oldog/Newtrick.
But, as bad as the news is, there are still some things you guys can take comfort in.
This was not a terrorist attack like 9/11. It wasn't like some group was able to get into a place as secure as an American military base and kill a bunch of people there. This was a lone American that decided to end his life, and figured he was going to take as many people with him as he could. You really can't protect yourself against someone doing something like that. It's not like your Department of Homeland Security could have found out about the plot if they'd bothered to investigate but didn't. Put this one in the same bag as Columbine. It's tragic, but it's also unpredictable, and there's nothing anyone could have done differently that would have prevented it from happening. When someone's willing to kill themselves, you can't stop them from doing it in a way that also kills others.
Probably it's only the western democracies like America where a guy can do something like that and then be nursed back to health at public expense in a modern hospital to face a fair trial. But, Gawd, sometimes it's hard to live with the degree to which we guarantee individual freedoms. In a case like this, I can see people just wanting to pull out a gun and blow the SOB away. There would seem to be an undeniable "fairness" in ending his life as calously as he ended the lives of others and left people crippled for life. But, no matter how severe his punishment, it doesn't restore the lives of his victims or bring any consolation to their families.
So, ya just gotta carry on. What else (besides the prayer and minute of silence) can you do? Some questions just don't have an answer.