 How long would it take for the needed replacements to be delivered to Freedom 19?
[Transcriber's Note: This etext was produced from Worlds of If Science Fiction, September 1962. General Finogenov notified Major Winship that the underground blast was scheduled for the following morning. Next morning, before the sunlight exploded, the four of them donned their space suits and went and sat outside the dome, waiting. "When?" "Boom—boom!" said Pinov. "I'll try again," Major Winship said and switched to the emergency channel. He crossed with the floating moon-motion to the airlock and entered, closing the door behind him. His foot was lifted for the second step when the floor beneath him rose and fell gently, pitching him forward, off balance. "Well," Lt. Chandler commented, "even though we didn't build this thing to withstand a moonquake, it seems to have stood up all right." Air currents whisked it away and plastered it against a riveted seam of the dome. It pulsed as though it were breathing and then it ruptured. Major Winship moved quickly to cut out the emergency air supply which had cut in automatically with the pressure drop. It's on your right side, midway up. Major Winship said, "they should have made these things more flexible." The sheet began slowly to slide downward, then it fell away completely and lay limply on the floor. After repeatedly assuring you there was no danger of a quake—and then to have something like this happen.
 ten days
 three hours  90 seconds  ten days  three weeks