Gas Masks

A Chicago Police officer puts away her gas mask during a protest of the NATO Summit in Chicago on Sunday, May 20, 2012. Several officers donned gas masks, after an apparent miscommunication, when word spread that some protesters had put on gas masks. (Credit: CBS)

McCarthy: Cops Donning Gas Masks During Protest Result Of ‘Miscommunication’

Chicago Police Supt. Garry McCarthy said Monday it was just a miscommunication this weekend, when police officers at Sunday’s anti-NATO demonstration began putting on their gas masks.

CBS Chicago–05/21/2012