CONSIDERATIONS TO KNOW ABOUT UNDERWATER NUCLEAR TEST 'UMBRELLA' (1958)

With test moratoriums within 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 were set to begin that day, plus the agenda reveals it, with 29 tests executed in Oct, four of these on the final working day. A person other test was cancelled