Most school entrances have a series of doors and some sort of a vestibule configuration. Historically, the vestibule was meant to keep warm air in and cold air, leaves, and dirt out of the school. Today, the vestibule is integral to safety, and...

Most organizations consider the exterior perimeter to be the brick and doors of a building. And, if everyone stayed inside the building, perimeter security would be much easier. Employees, students, and visitors are vulnerable the moment they step...