Deterrence is central to security. (In fact, "Deter" is one of the "Four Ds" of active shooter preparedness.) After all, entirely preventing an attack is the best possible security outcome.

Security Theater: Deterrence and Psychological Reassurance

General Security

“Security theater” is a phrase that security experts coined to denote measures they believe give the feeling of safety without providing actual security improvements. Initially, it was applied to the slapdash security screenings at airports in the early 2000s. The term has since spread more widely, as public security measures …