Islamist Terrorism: Germany Is Home to More than 600 Agitators

At least one of the assailants in the Vienna attack was known to police. The 20-year-old, shot dead on Monday evening, had made several attempts to leave the country and join the so-called Islamic State (IS). It would appear, however, that the authorities did not see him as a potential terrorist. 

Similar miscalculations have happened in Germany too.

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