To be fair, you have to have a very high (haha_yes)

For more than a year, ominous rumors had been privately circulating among high-level Western leaders that the Soviet Union had been at work on what was darkly hinted to be the ultimate weapon: a doomsday device. Intelligence sources traced the site of the top secret Russian project to the perpetually fog-shrouded wasteland below the Arctic peaks of the Zhokhov Islands. What they were building or why it should be located in such a remote and desolate place no one could say.