NEW STEP BY STEP MAP FOR UNDERWATER NUCLEAR TEST 'UMBRELLA' (1958)

With test moratoriums over the horizon, American weapons labs rushed out a lot of new designs. A hard deadline for testing was set at midnight (0000 hrs), 31 October 1958, as negotiations had been set to begin that day, as well as timetable displays it, with 29 tests executed in Oct, 4 of these on the final day. A person other test was cancelled si