TOP UNDERWATER NUCLEAR TEST 'UMBRELLA' (1958) SECRETS

With test moratoriums about the horizon, American weapons labs rushed out lots of new models. A hard deadline for testing was set at midnight (0000 hrs), 31 Oct 1958, as negotiations were being set to begin that day, as well as the plan reveals it, with 29 tests executed in October, four of them on the last working day. One particular other test wa