DETAILED NOTES ON UNDERWATER NUCLEAR TEST 'UMBRELLA'

With test moratoriums on the horizon, American weapons labs rushed out lots of new types. A tough deadline for testing was established at midnight (0000 hrs), 31 Oct 1958, as negotiations have been set to start that day, as well as the schedule displays it, with 29 tests executed in October, four of these on the final working day. A person other te