A man can be killed by a toy gun—he can die of fright, for heart attacks can kill. What, then, is the deadly thing that must be sealed away, forever locked in buried concrete—a thing or an idea? Illustrated by Riley Out of the twenty only one managed to escape the planet. And he did it very simply, merely by walking up to the crowded ticket window at one of the rocket ports and buying passage to Earth. His Army identification papers passed the harassed inspection of the agent, and he gratefully