Nebraska Shooting In a "Gun Free Zone"

Despite signs around the mall in Omaha, Nebraska telling people about the gun-free zone the mall was supposed to be, a lone rogue with his stepfather's gun still managed to kill eight people. Sounds like Virginia Tech. Or that mall in Colorado in which a similar thing happened.

Another factor of this shooting was the guards in the mall. Even though it was a private security force, no guard was armed. It's the same situation, when the criminals are armed, and any person who would otherwise be able to prevent incidents like this isn't.

About a month ago, a gunman killed five people in a school in Finland. Even though Finland actually has quite liberal gun laws, why was no one pouncing on that?