San Francisco police chief bans 'thin blue line' face masks

San Francisco’s police chief said the city’s rank and file will wear neutral face coverings to defuse a controversy after officers sent to patrol a May Day protest wore masks adorned with the “thin blue line” flag. The police union ordered and distributed the masks emblazoned with black-and-white American flag with a blue stripe across the middle. The symbol is associated with the Blue Lives Matter movement, a display of unity among police officers in response to the national Black Lives Matter movement.

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