What went wrong with the Trident missile test launch, in one graphic

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Matthew Savill, director of military sciences at the Royal United Services Institute (Rusi), said that overall Trident had a “good record”. The US, which has the same system, announced there had been 191 successful test firings since 1989 and “single figure” number of failures. He said this compared with a reported 50 per cent failure rate for the Russian Bulava missile recently accepted into service. A US submarine successfully fired a Trident missile as recently as October. ...Savill said that nuclear powers monitored each others’ tests closely, and the “demonstration of a credible, ie functioning, capability is an important part of deterrence”.