UNDERWATER NUCLEAR TEST 'UMBRELLA' (1958) OPTIONS

With test moratoriums to the horizon, American weapons labs rushed out a lot of new models. A tough deadline for testing was set at midnight (0000 hrs), 31 October 1958, as negotiations were set to begin that day, as well as the timetable demonstrates it, with 29 tests executed in Oct, four of these on the last day. 1 other test was cancelled for t