This kid from Parkland is blasting a teacher who he claims "wouldn't let him in" from the hallway in to his classroom when the shooting began. It is my understanding that protocol is for once an event like this takes place, and "lockdown" is instituted, teachers are to close and lock the doors, barricade the door, and NOT OPEN THE DOOR for anyone until the "all clear" has been given.
Is that correct?
Is that correct?