I am shocked by this whole ordeal,
First of all, the people in that building would not have been able to get a gun, they were not citizens. So we know they are not going to be armed.
Second, why didn't the police stop him after he killed the first person? Oh, right, cops show up to investigate a crime...citizens stop crime.
Except that one incident at Trolly Square Mall in Salt Lake City...a armed off duty cop stopped that gunman. I notice that in the Foxnews column of all the shootings over the years they left that one out.