Tens of thousands of people around the world have seen the moment one Royal Navy minehunter reversed into another in Bahrain, doing millions of pounds worth of damage.Former Royal Navy Commodore Alistair Halliday talks us through the range of technical and human factors which could explain why HMS Chiddingfold went backwards instead of ahead.The Chief of General Staff wants the UK to train up a “citizen army” to be ready for war. Mike explains why this doesn’t have to mean conscription, and former Conservative leader Sir Iain Duncan Smith gives us his reaction.And are killer robots an inevitability in the future of war? Someone who’s helped shape UK policy on autonomous weapons tells us why he’s written a novel to warn about the risks of science-fiction becoming lethal-fact.

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