This month, school resource officers in Pima County are teaching the public how to respond to an active shooter. The program is in its second year. Pima County Sheriff's Deputy Bill Farmer estimates more than 600 people have utilized the one-day workshop, which is held at high schools across the county. At Cienega High School in Vail, about three dozen participants went through the program's four scenarios in which a person with a gun threatens students.
"Back in the Cold War era and shortly thereafter, we trained kids to hide underneath desks when the air-raid sirens went off. But this is our air-raid siren. This is what's happening in our generation," Farmer said.