SAN DIEGO —The gunman stalked the dormitory halls yelling "I'm going to kill somebody," pounding and kicking on doors, and firing his weapon in the air.

The resident assistants remembered their training: turn off the lights, barricade the doors with chairs and tables, lie flat on the floor, push back if the killer tries to bust in, or jump out a window if it isn't too high.

The drama was all staged but with a life-saving purpose Tuesday as a dormitory at San Diego State became a stand-in for Columbine High School, Virginia Tech, Sandy Hook Elementary and the engineering building on the campus here — all scenes of deadly rampages.

Two dozen people from colleges and schools throughout Southern California came to campus for a two-day session with the chillingly modern title of Active Shooter Response Training.

Read more at LA Times