"The average number of people shot in a mass shooting event when the shooter is stopped by law enforcement: 14.
"The average number of people shot in a mass shooting event when the shooter is stopped by civilians: 2.5.
"The reason is simple. The armed civilians are there when it started."
The Right Response? How to reduce violent crime and guarantee your safety!
"Bad guys with guns - bad, and good guys with guns - good!"
- Harrold School District Superintendent, David Thweatt, along with many others
http://ezinearticles.com/?The-Government-Response-to-the-Previous-School-Massacre---Part-1-in-The-Right-Response?&id=7523662