silence for a moment as the taxi braked smoothly to a halt, guided and controlled by the automatic machinery in the hood.

Then, suddenly, the driver said: "Ship up!" He pointed east, along 45th Street, toward Long Island. Far in the distance was a rapidly rising vapor trail, pointing vertically toward the sky, the unmistakable sign of a spaceship takeoff. They didn't leave often, and it was still an unusual sight.

Houston said nothing as he climbed out and paid the driver, tossing in an extra tip.

"Thanks, buddy," said the driver. "Watch out for them kids."

Houston didn't answer. He was still watching the vapor trail as the cab pulled away.

There goes Harris, he was thinking. An innocent man, guilty of nothing more than being born different. And because of that, he's labelled as an inhuman monster, not even worthy of being executed. Instead, he's taken into space, filled full of hibernene, and chained to a floating piece of rock for the rest of his life.

Such was humanity's "humane" way of taking care of the bogey of Controllers. Capital punishment had been outlawed all over Earth; it had long since been proved that legalized murder, execution by the State, solved nothing, helped no one, prevented no crimes, and did infinitely more harm than good in the long run.

With the coming of the Controllers, a movement had arisen to bring back the old evil of judicial murder, but it had been quickly put down when the Penal Cluster plan had been put forth as a more "humane" method.

Hibernene was a drug that had been evolved from the study of animals like the bear, which spent its winters in an almost death-like sleep. A human being, given a proper dosage of the drug, lapsed into a deep coma. The bodily processes were slowed down; the heart throbbed sluggishly, once every few minutes; thought ceased. It was the ideal prison for a mental offender that ordinary prisons could not hold.

But it wasn't quite enough for the bloodthirsty desire for vengeance that the Normals held for the Controllers. There had to be more.

Following Earth in its orbit around the sun, trailing it by some ninety-three million miles, were a group of tiny asteroids, occupying what is known as the Trojan position. They were invisible from Earth, being made of dark rock and none of them being more than fifteen feet in 

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