When I worked in Paris our offices had a system to protect from crazies entering the building. You first entered the rotating door and it stopped you from entering the building until you held up your badge for the receptionist inside and she could see you before you entered. If you were OK she would "buzz" the door and it would turn and allow you to enter. There were also very deep cement barriers to prevent from a car or truck smashing into the building. The resturant next door had been bombed thus serious controls over entrances. I don't understand why more business's that are under threats of attack don't install systems like this to protect the Company. Ours were installed in the '90's when a bunch of anti business crazies were running around. There are ways to protect your people but it takes investments and dedication to protections from "nuts"
