https://www.wusf.org/2021-12-07/examining-the-counter-effects-school-lockdown-drills-may-have-in-the-long-run
NPR's Steve Inskeep talks to Dr. David Schonfeld of the National Center for School Crisis and Bereavement at Children's Hospital in Los Angeles, about the...
school lockdown drillsexaminingcountereffectsmay