The Airway and Transit Policing topic is aimed at the law enforcers who keep our transit systems safe. Railway freight and passenger trains, subway systems and urban commuter buses, and of course commercial airlines and their terminals would all be vulnerable to crime and terrorism if not for the sheepdogs who protect them.
A Los Angeles County Sheriff's deputy walks past an opening pedestrian barrier. Six terrorist plots targeting U.S. subway and rail systems have been exposed since 9/11. (AP Photo)
Systems remain targets