(Such had come to Britain in its Hour of Tragedy when the last savage hope of Empire Regained dissolved into vapor, and the Isles became slag. There the fourth network corroded under a shroud of ash; but the surviving three ceaselessly hummed.) * * * * * 3 men, of one species but riven somehow at this point in time by pigment, tongue and details of dress: a man from Brownsville, a man from Vladivostok, a man from Khartoum ... buried deep in the hearts of the networks, each already entombed, and so safe from death. Each chosen by his masters to be the nock of the arrow, the final factor; yet not an arrow, for each network of course was aimed at both the others. A moment's trust is fatal once the truce is broken, the masters reasoned, and so the bombs and the men were trained. * * * * * 2 buttons, a choice under the fingers of each of these men: one, red, to loose deliberately the double pronged torrent of bombs if the masters so decreed. The other, white, to cancel the launching command broadcast automatically if massive radiation spewed across the homeland ... a vast, vicious death reflex. Each man, then, if the detectors tolled, had the decision: error or attack. Fail or be unable to press the white instantly, and the counter-attack, if such it was, began. This, then, was the masters' last concession to the human factor, their grudging one to humanity. And like most of the masters' concessions to the masses, it was false. Identically, in each network, the white button was a dummy. The real choice was as it always was--red button, kill ... or wait yet a while more. The men in the tombs, unknowing, knew this was the choice. * * * * * 1 man's brain, whosoever, however carefully masters may mold it, is a fragile thing. Ten thousand years have not fitted man to live with himself; could a single man live with the lives of two billion? The choice, distillate of a hundred centuries of pain, the weariness of a species with race: blame them, blame all. One of the men sitting in a cold tomb sweated. His finger hovered over the red button, trembled ... and fell. End of the Project Gutenberg EBook of Countdown, by Julian F. Grow