Jeremy MacKenzie, leader of online group 'Diagolon,' arrested in Nova Scotia: RCMP

Jeremy MacKenzie is seen in this photo from his Facebook page. (Jeremy MacKenzie/Facebook) Jeremy MacKenzie is seen in this photo from his Facebook page. (Jeremy MacKenzie/Facebook)

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San Francisco will allow police to deploy robots that kill

Supervisors in San Francisco voted Tuesday to give city police the ability to use potentially lethal, remote-controlled robots in emergency situations -- following an emotionally charged debate that reflected divisions on the politically liberal board over support for law enforcement.