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What makes sleeper cells so dangerous
In light of the terror attacks in Paris and the raid on terror suspects in Belgium, Brian Todd looks at how sleeper cells work and the danger they pose.
01:58
- Source:
CNN
Belgium Terror Raids
18 videos
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Source: Paris terror suspect captured, injured but alive
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Pres. Hollande: I am thinking of the victims right now
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Two suspects on the run in Brussels, another hospitalized
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Report: Belgian terrorists wanted to behead official
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Witness describes filming of terror raid in Belgium