Transcription: Professor Sir Harry Hinsley. How important would you say that fortitude was? Going to fortitude, of course it wouldn't have been possible to do it delicately as we did without this altar behind us. But because that told us what they expected, we were able to manage the business of fortitude, the deception very carefully. But I would sum it up very briefly by saying that it wasn't any use really before D-Day because nothing could persuade the Germans that we weren't going to cross the Channel. They wouldn't be persuaded we were going to Norway, which is what Fortitude tried to do before North D ...
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