They came like monsters, rather than men, into the vast ruin of what had once been a great city. They walked carefully, side by side, speaking to each other by radio as though they were in deep space rather than upon solid ground.

The winding way they followed through the ruins was marked by blurred footsteps in the dust and the two men, clumsy in their bulky suits, found the going difficult.

They stopped, and one of them held out an instrument. He studied the dial. "All clear," and both men removed their helmets. They wiped sweat from their faces and glanced at each other.

The blonde man said, "The air's okay, Jarvis. Everything seems all right. I don't get it."

Jarvis, his dark eyes wary, scowled as he looked about. "It seems all right. But we know it isn't. It can't be."

"I'm shucking this suit."

"Don't be a fool, Mark!"

"But the dial read _clear_, man! And we know nobody is going to shoot us. All life _had_ to be wiped out."

"How about minor power installations?"

Jarvis took a chocolate bar from his pocket, sat down on a piece of broken rubble and began to eat. "You're too careless--far too careless, Mark."

Mark laughed. "You've always been cautious enough for both of us. Got me out of plenty of scrapes back in school, too. Don't think I've forgotten." Affection warmed his blue eyes as they rested on the face of his friend.

"Okay! Okay! But what happened to them? Where did they go?" Jarvis took nervous bites from his second chocolate bar. Then he, too, peeled off his suit. He sniffed the air distrustfully, as he wiggled his shoulders to free them from the clinging, damp shirt. Then he took a few experimental steps forward.

"Seems all right, Mark. But how do you explain about Hank and Garland? Never were two more careful guys."

"Probably a simple miscalculation. Or an accident. We know it couldn't have been enemy action. Tests prove conclusively that we wiped them out--to a man." He took deep gulps of air into his lungs, and stretched like a cat. "We'll find out soon enough. Boy, I feel great!"

They deflated and 

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