clear skies. Then about 9 P.M. Eastern Standard Time, a thickening mist descended over warm and drowsy southwest South Carolina. It was a fog that was not a fog, observers said afterwards, because there was no damp, no coldness—just a steady loss of visibility until a man couldn't see his hand held up in front of his face, even though a bright moon was shining. Most of the reporting night shift at the Aiken hydrogen bomb plant never reached the tightly-guarded gates. Those who did were not allowed in. At the same hour, across the world at the newly-built underground heavy water factory of Rossilovskigorsk, west of the southern tip of Lake Baikal, the late morning sun cast deep shadows into the gaping holes in the hillside which marked the plant entrances and exits. Deep below, miles of filtration chambers hissed quietly as they prepared their deadly concentrate. Then, without warning, the sun grew watery and paled, and within a few minutes a haze began to form at ground level. It grew thicker and thicker; the sun became a dim orange sphere, then was blotted out. Total darkness enveloped the area. And at the same hour, the watchers manning the lonely circle of probing radar domes, facing each other across the frozen wastes of the Arctic, cursed softly in Russian and English as their scopes sweeping the upper air first went blank and then dark. They were shaken men at the meeting in General Morganson's office the next morning. "Over 30 key men gone from Aiken," Morganson was saying. "In terms of goals, it means that our 1960 program now cannot possibly be fulfilled until 1965. If the situation develops as forecast in Dr. Forster's statement, our entire nuclear weapons program will grind to a halt within two weeks. If we drain men from civilian research, it will cause a total breakdown in the civilian atomic power production program. As you all know, the nation's entire economic expansion program is based on the availability of that power. Without it, industry will be forced into a deep freeze. That in turn means we might as well run up a white flag on the White House lawn." He smiled thinly. "I would be a lot more worried than I am except we have the first indications that the other side is in the same boat. I broke every regulation in the book last night when I talked to Malinowski. I took the liberty of warning him, on the basis that there was nothing to lose. His reaction then was that it was all a Wall