What does a critical terror threat mean for the UK?

In the wake of the attack in Manchester that left 22 people dead and many more injured, U.K. authorities have raised the terror threat level to critical.

Newsweek

• May 24, 2017 19:03 IST

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In the wake of the attack in Manchester that left 22 people dead and many more injured, U.K. authorities have raised the terror threat level to critical.