The nuclear threat is rising. But do we really know how to manage deterrence in this new landscape? For some time now, former No 10 adviser Dominic Cummings has been blogging about the fragility of deterrence and the possibility of nuclear catastrophe. But perhaps his most interesting remarks—phrased carefully to avoid spilling official secrets—come on the topic of the UK’s fraying nuclear weapons infrastructure. Whatever you think of Cummings, and whether you support or oppose Trident, the point is worth listening to...."