The world's democracies are facing an ever increasing threat of so-called invisible attacks - according to the Defence Secretary and the Head of the Armed Forces.

Ben Wallace and General Sir Nick Carter have been speaking to Sky's Foreign Affairs Editor Deborah Haynes - about what's called "the Greyzone" - where cyber attacks and disinformation are used to destabilise other countries.

And those attacks - chiefly from Russia, China and Iran - risk unravelling the world’s democracies “without a shot being fired”.

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