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

With test moratoriums to 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 have been established to get started on that working day, and the routine displays it, with 29 tests executed in October, four of these on the last day. One particu