 He joined the Royal Canadian Air Force in 1939 as a flight lieutenant , completed an advanced course and served until mid @-@ 1941 as instructor of British Commonwealth Air Training Plan instructors . After a short period in England at a glider and paratrooper training center , he was posted to No. 405 Squadron RCAF . On returning in difficult weather conditions after bombing Berlin with the squadron on the night of November 7 , 1941 , he was forced to land his aircraft on a non @-@ operational airfield , and as a result was temporarily suspected of being a spy by the Home Guard . 
