Chinese cities must brace for a potential nuclear attack, a new study has warned, singling out Japan for “sending a major danger signal” to the world. The report, from a People’s Liberation Army medical team, said the likelihood of a large-scale global nuclear war was relatively low. “However, the possibility cannot be ruled out that small or medium-sized nuclear-armed or potentially nuclear-armed states, driven by geopolitical or religious conflicts, could carry out a single nuclear-weapon...