Well what I heard was to get into the building you need to show an employee badge or if you are a visitor you need to have the guard station call inside to the employee you are visiting and they take their badge number down to verify. In this case it seems that the guy was a Contractor for the building today and somehow got the gun in with the tools or the truck. I dunno but its all getting sad that everywhere is and can be a target for a loony....Wonder when gary is gonna go off lol