UNDERWATER NUCLEAR TEST 'UMBRELLA' (1958) OPTIONS

With test moratoriums about the horizon, American weapons labs rushed out many new types. A tough deadline for testing was established at midnight (0000 hrs), 31 Oct 1958, as negotiations ended up established to get started on that working day, and also the plan displays it, with 29 tests executed in October, 4 of these on the last day. A single ot