DETAILED NOTES ON UNDERWATER NUCLEAR TEST 'UMBRELLA'

With test moratoriums over the horizon, American weapons labs rushed out a lot of new types. A hard deadline for testing was set at midnight (0000 hrs), 31 October 1958, as negotiations had been established to get started on that working day, plus the agenda exhibits it, with 29 tests executed in Oct, 4 of these on the final day. 1 other test was c