This is bad Mlik Powell said. We've only got enough air in our spacesuits for si more hours If we can't get back inside the base we're going to die. I've sent radio messages to Dave said Donovan. But he's not answering. The men could not move many of the rocks because they were too heavy. The engineers could only make a very small hole in the wall of rocks. Donovan crawled to the hole and looked through it. Greg The robots are about fifty feet away he said. We have to get Dave to come closer. When he's near us he'll behave normally again. Then he can save us. Powell pushed his friend away from the hole and looked through it himself. Donovan looked through the hole again. He can't hear you said Donovan. What are you going todo? said Donovan. I'm going to shoot one of the fingers Powell replied. Why? I'll explain later Powell replied. Let's see if my plan will work. Powell took his gun from his belt. He fired three times and one of the sud robots fell. Then Powell called Dave's name into his radio. There was silence for a few seconds then Dave's voice answered.