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Amy, Yes, I believe you are correct about the original Operation Valkyrie. But I think(I will have to rewatch it) video 13 was referring only to the plot in '44 to assassinate Hitler. Any other qualms?
Look at the blueprints for Auschwitz. The so-called gas chamber was, in reality, designed as a morgue. It had wooden doors for crying out loud! Not exactly a hermetically-sealed, airtight chamber, now is it?
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