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I met him at a Holocaust education centre in Dachau, in southern Germany, just around the corner from what was once a Nazi concentration camp of the same name.

This is the third part of a three-part conversation with Historian Timothy Ryback, the author of several books including "Hitler’s Private Library," "Hitler’s First Victims," and "The Last Survivor: Legacies of Dachau."

Margol didn’t land at D-Day, but the Jacksonville, Florida, native was among those that liberated the Dachau Concentration Camp on April 29, 1945.

Was part of a unit, also including his twin brother, Howard Margol, that liberated the Dachau Concentration Camp on April 29, 1945.

Arnold said his grandfather told him “how awful and shocking” Dachau was and how it “changed everyone” who ever saw it firsthand.