Do we need defence at all? - Video

From international terrorism to foreign crises, natural hazards to cybercrime, Britons hear much about the numerous and impending threats to civil society. Recent events have put these issues on centre stage again, provoking anxious discussion at all levels about what can or should be done. But do these incidents constitute a real and imminent threat to the security of this country and its citizens? If so, what measures can or should be taken by the government in response?