Final answer:
The drill procedure described in the statement is a Lockdown, where the perimeter of buildings and grounds is secured during incidents that pose a threat or hazard outside of the building.
Step-by-step explanation:
The type of drill procedure that is described in the statement is a Lockdown.
During a lockdown, response actions are taken to secure the perimeter of buildings and grounds when there is a threat or hazard outside of the building. This procedure is implemented to ensure the safety of individuals inside by restricting access, allowing no one in or out until the situation is resolved.
Lockdown drills are conducted in various situations, such as during a potential threat from an intruder or a dangerous event occurring nearby.
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