From 1940 to 1944, Nazi dictator Adolf Hitler oversaw his troops fighting in World War II as well as the mass murder of some 6 million Jews from the safety of a heavily fortified bunker in what is now north-eastern Poland. Known as the Wolf’s Lair, the site also witnessed the failed assassination attempt by Claus Schenk von Stauffenberg, which Hitler only survived by chance. For decades, the huge bunker complex hidden in the dense forest of Kętrzyn lay abandoned and forgotten. It has since become a place of remembrance. In the latest from the dpa trends & features desk, the son of a former gua…