"The Canadians have concluded that the art of escape is part of the regular curriculum of the well-trained Nazi soldier, sailor and airman. Even as prisoners the Germans hold their own escape classes and specialize in devising ingenious tools out of anything available. In one camp a workable radio was made out of a typewriter. Most of the prisoners have escaped by tunneling to some point outside the compound, but this is discouraged now by dynamite charges buried around the camps."
Click here to read about the Canadian POWs who collaborated with the Nazis.