DETAILED NOTES ON UNDERWATER NUCLEAR TEST 'UMBRELLA'

With test moratoriums around the horizon, American weapons labs rushed out lots of new styles. A hard deadline for testing was set at midnight (0000 hrs), 31 October 1958, as negotiations have been established to start out that day, plus the agenda demonstrates it, with 29 tests executed in Oct, 4 of these on the final working day. One other test w