DETAILED NOTES ON UNDERWATER NUCLEAR TEST 'UMBRELLA' (1958)

With test moratoriums over the horizon, American weapons labs rushed out a lot of new models. A tough deadline for testing was established at midnight (0000 hrs), 31 Oct 1958, as negotiations were established to start out that working day, and also the program reveals it, with 29 tests executed in October, four of them on the last working day. A si