"Yes, I have," Joe Buckner said. "Why don't we just kill all of these natives? They're not any good to us."
The instructor smiled slyly. "I'll tell you a little secret about that. It's awfully hard to kill all of any race. No matter how thoroughly you do the job, a few always manage to escape. Then they breed and increase in spite of everything you do.
"After we had conquered this planet we had trouble catching all of the natives. They were the most cantankerous, persistent race you can imagine. So these museums were set up, to lure them in here. We announced that these places would be set aside and that they would not be bothered as long as they remained in the museums. All in all, we made the museums rather attractive places, hoping that—"
"I see the plan!" Joe Buckner said glowingly. "After you got them all into the museums—blooie!—knock all of them off at once!"
The instructor smiled. He looked as pleased as if he had thought of the idea himself. A little stir of applause ran through the group as they expressed their gratitude to their rulers for making this world safe for them.
"Why haven't they been killed before now?" Billy Kasker asked. "These museums were opened over forty years ago. Surely—"
"I don't know about that," the instructor answered. "I think probably our rulers are waiting for a propitious time, or perhaps for an incident that will give them an excuse to carry out their plan."
"I hope they don't wait too long," Joe Buckner said. "Golly, I want to be a Thorgunner and get in on the mop-up when it comes!"
The group stirred, seemed to look forward to the day of the final slaughter.
"Any other questions?" the instructor asked.