 What is the main conflict at the start?
[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. "Ah, it's all Russian. A moth's wing of dust would, perhaps, rise and settle beyond the horizon: no more. 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. It's on your right side, midway up.
 The Americans are unable to tell when the scheduled explosion is going off.
 The American astronauts can't get in contact with anyone who speaks English.  Winship's reefer stops working properly.  The Americans are unable to tell when the scheduled explosion is going off.  The harsh sunlight is making the astronauts perspire.