Teachers' response prevented further death, expert says
Inside The Covenant School, the shooter fired multiple rounds into several classrooms but didn't hit any students inside the classrooms, "because the teachers knew exactly what to do, how to fortify their doors and where to place their children in those rooms," security consultant Brink Fidler told CNN's Erin Burnett OutFront.
"Their ability to execute literally flawlessly under that amount of stress while somebody trying to murder them and their children, that is what made the difference here," he said.
"These teachers are the reason those kids went home to their families," he added.