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Trident nuclear warheads damaged in a vehicle pile-up or a plane crash could partially detonate and deliver a lethal radiation dose, according to a newly declassified report from the UK Ministry of Defence obtained by New Scientist. The MoD has also revealed that an attack by terrorists on a nuclear weapons convoy could produce an even more disastrous outcome. “The consequences of such an incident are likely to be considerable loss of life,” says a senior MoD official.

Trident warheads are regularly transported to weapons facilities in the US and the UK, where they are inspected to make sure…

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