"FILE - In this May 27, 1956 file photo, French troops seal off Algiers' notorious casbah, 400-year-old teeming Arab quarter. French President Emmanuel Macron has formally recognized that the French state was responsible for the death of a dissident mathematician in Algeria in 1957, admitting for the first time the French military's ""system"" of torture during Algeria's independence war. (AP Photo)"
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