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

With test moratoriums about the horizon, American weapons labs rushed out several new designs. A tough deadline for testing was set at midnight (0000 hrs), 31 October 1958, as negotiations had been established to start out that working day, as well as routine shows it, with 29 tests executed in October, 4 of them on the last working day. A single o