I'd run across a reference to this in an old documentary video on "Camp Century" now online. Watching it I got the distinct impression that the story was not as it was described -- the mission involved 3,000 m of tunnels, included a shop, theater, and church, some 200 men, and a nuclear reactor for power generation. That's a lot of men and materiel just for a science mission.
As noted, turns out it was cover for a larger scheme: 4,000 kilometers of tunnels in which 600 nuclear-warhead tipped missiles were to be deployed.
But the ice cap proved too unstable and the project was cancelled after six years (the reactor removed before that).
The true irony is this: one of the more enduring results of the mission was scientific, as it produced numerous ice cores and established that the Greenland ice cap was far more dynamic than originally thought. Fake science ends up producing ... real science.
https://en.wikipedia.org/wiki/Project_Iceworm http://defensetech.org/2012/04/06/inside-the-armys-secret-co... Greatest Mysteries of the Cold War: Nuclear Powered Subterranean Secret Base in Greenland (720p) http://fixyt.com/watch?v=NkvRwoVdzk8