 What is the new problem the American astronauts are left with at the end of the passage?
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. A moth's wing of dust would, perhaps, rise and settle beyond the horizon: no more. 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. Air currents whisked it away and plastered it against a riveted seam of the dome. Major Winship said, "they should have made these things more flexible."
 The barrel has destroyed their air supply.
 The dome has no been compromised.  The barrel has destroyed their air supply.  The calking compound has hardened and become unusable.  They can no longer fix the leek in the dome.