Fiona Bruce presented a live question and answer programme to discuss the issues raised in Dirty War.
Fiona Bruce put your questions to a panel of experts
She put your questions to a panel of experts including Dr Sally Leivesley of Newrisk Limited, former scientific adviser on UK emergency contingency planning; M J Gohel, CEO of the Asia-Pacific Foundation; and Mike Granatt, the former head of the cabinet office's civil contingencies secretariat.
We asked you to send in your questions.
Do you feel adequately prepared to cope with a chemical, biological, radiological or nuclear attack?
How real do you think the terrorist threat is?
Can we ever prepare for the unexpected?
Dirty War - Your Questions Answered was broadcast on Sunday, 26 September at 2250 BST, BBC One.