Updated 8 hour(s) ago
All it took was three words, and B.M.C. Durfee High School went silent.
As Principal Paul Marshall shouted "lockdown, lockdown, lockdown" into the school's public address system, doors throughout the school were quickly closed, and, for the most part, a glance into rooms from the hallways made them appear to be empty.
The Durfee exercise was part of a series of drills that have taken place at schools in the city's public school district since students returned from vacation on Jan. 2. Additional drills will continue throughout the month.
Durfee lockdown drill highlights safety procedures
Flanagan says, at least in short term, police will remain at schools