What is the system of two openings designed to open only one at a time?

• A. Report
• B. Sally port
• C. Search
• D. Seizure

Answer: (B)

Two-door entry systems act as a controlled chokepoint. You have an outer door and an inner door that open into a small vestibule, and the design ensures only one door can be opened at a time. This setup lets staff control who moves through the point, verify identity or conduct a quick check, and prevent a direct line from outside to inside. That specific arrangement is a sally port, commonly used at correctional facilities and other high-security locations to reduce risk of escapes, contraband, or assaults. The other terms are actions or processes, not the name of the physical two-door system.