First look at 'Hired Guns'

Editor's Note: 'Hired Guns' is a special two part report airing December 9 and 10 at 8p ET on AC360.

You see them everywhere — armed security guards. In a yearlong investigation by CNN and The Center for Investigative Reporting (CIR) found, despite the image of safety, armed guards often themselves pose a threat in an industry plagued by lax laws, minimal oversight and almost no accountability.