RUMORED BUZZ ON UNDERWATER NUCLEAR TEST 'UMBRELLA' (1958)

With test moratoriums to the horizon, American weapons labs rushed out quite a few new layouts. A tough deadline for testing was set at midnight (0000 hrs), 31 Oct 1958, as negotiations had been set to get started on that day, as well as the timetable exhibits it, with 29 tests executed in Oct, 4 of these on the last working day. One other test was