THE DEFINITIVE GUIDE TO UNDERWATER NUCLEAR TEST 'UMBRELLA' (1958)

With test moratoriums within the horizon, American weapons labs rushed out many new patterns. A tough deadline for testing was established at midnight (0000 hrs), 31 Oct 1958, as negotiations ended up established to get started on that day, as well as the plan demonstrates it, with 29 tests executed in Oct, four of these on the final day. A single