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

With test moratoriums about the horizon, American weapons labs rushed out quite a few new designs. A hard deadline for testing was set at midnight (0000 hrs), 31 October 1958, as negotiations were set to start that working day, as well as the plan reveals it, with 29 tests executed in Oct, 4 of them on the last day. One particular other test was ca