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

With test moratoriums about the horizon, American weapons labs rushed out numerous new types. A tough deadline for testing was established at midnight (0000 hrs), 31 Oct 1958, as negotiations ended up established to start out that day, as well as program reveals it, with 29 tests executed in October, 4 of these on the final day. One particular othe