They were American and British air force officers in a German prison camp.
It demanded the concentrated devotion and vigilance of more than six hundred men--every one of t.
It was a split-second operation as delicate and as deadly as a time bomb.
They developed a fantastic security system to protect themselves from German surveillance.
With only their bare hands and the crudest of homemade tools, they sank shafts, forged passports, faked weapons, and tailored German uniforms and civilian clothes.
They were American and British air force officers in a German prison camp