wouk to "cnn newsroom." fair to say it's a busy travel weekend with a lot of people headed home after the holidays. in the city of chicago passengers at midway and chicago's o'hare's airports may be surprised to learn some aviation officers are not only unarmed, they're told to runaway if there is an attack. >> hoarse cnn's senior investigative correspondent drew griffin with the story. >> take a look at the passenger terminals at chicago's o'hare and midway airports and you will see what appear to be police officers. but take a closer look. not one of them is carrying a gun. in the event of an active shooter or terrorist strike here, you might be surprised to hear how they've been told to react. not try to neutralize the threat but instead to run. >> you guys are police officers.