scenario 1.2 scenario 02 Participants: Participants: • • • • • • Turnstile worker Policeman Vitalya Turnstile worker Policeman Vitalya Time: Time: Not during the rush hour Rush hour Unit 1 walks through frames. Vitalya and turnstile worker operate the frames. Vitalya considers Unit 1 suspicious and takes him to the X-ray to check his bag. Turnstile post is unattended. Turnstile worker substitutes Vitalya at the frames while he inspects Unit 1. Conclusion Conclusion Turnstile worker has to be trained and qualified as much as Vitalya is to be able to operate the frame. If Vitalya is at the X-ray, turnstile worker operates the frame alone.