MI5 chief warns Facebook encryption gives 'free pass' to suspects
Suspects have been as young as 13, usually after being radicalised online.
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MI5 chief warns Facebook encryption gives 'free pass' to suspects
By NewVision Reporter
Journalists @NewVision
Extremism on social media is as much a national security risk now as terrorism from Afghanistan or Syria, the head of UK domestic intelligence has warned as he slammed Facebook