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(Female announcer) Governments worldwide battle to control and contain terrorism.
Police and the courts struggle to separate harmless loners from dangerous lone wolves.
Opinions differ on the most effective way to combat terrorist attacks,
from military interventions on the ground, to curbing political and religious radicalisation.
But in this edition of Discovery, we'll be hearing about a more unusual new weapon
that might be used in the future to fight terrorism:
maths (1:00)