Editor's Note: On the night of March 24-25, 1944, 76 Allied prisoners of Stalag Luft III, a German prison camp in Sagan, 100 miles southeast of Berlin, escaped through a tunnel named "Harry." Within days most were recaptured. An outraged Hitler had 50 of them shot, an appalling abrogation of the Geneva Convention, to which Germany was a signatory. Twenty-three were reincarcerated. Only three made it all the way to freedom—a Dutchman and two Norwegians, all flyers with the British Royal Air Force. Here's their remarkable story, which begins at the Sagan railway station. For locations of relevant towns, consult our map.