What best describes a lockdown procedure and when is it used?

• A. A plan to evacuate all occupants through exterior exits.
• B. A routine drill that happens quarterly with no security implications.
• C. A policy to lock exterior doors during business hours only.
• D. Restricting movement and securing doors to protect occupants during a threat inside the building.

Answer: (D)

Lockdown is a response focused on restricting movement and securing the building to protect occupants when a threat is inside. The goal is to isolate the danger, keep people out of harm’s way, and give responders a safer environment to work in. It’s used when there is an active threat inside the building—like an intruder or attacker—where moving people out through exits would put them at greater risk or isn’t feasible. In a lockdown, occupants typically stay put, secure doors, turn off or silence lights and devices, and avoid windows or visibility until authorities say it’s safe to move. This differs from evacuating everyone through exterior exits, which is appropriate when the threat is outside or has been resolved. It’s not a routine drill with no security implications, and it isn’t just about locking exterior doors during business hours.