Just over a week ago, as a crew of roofers worked on the outside of the school, a team of police officers, volunteers, school staff and trainers set up inside and practiced how they’d respond to an active shooter.
It was a tense, noisy environment. Volunteers yelled for help, another repeated “lockdown, lockdown, lockdown,” over the intercom as they ran through the building. The man acting as the shooter shouted and fired – with simulated…

