Explanation: During WW2, Switzerland, as per its custom, was neutral. However, Swiss ’neutrality’ included allowing the Nazis to launder a great deal of their ill-gotten loot, including from the national treasuries of the countries the Nazis conquered, and the literal bodies of dead Jews in the Holocaust. When the war ended, the infamously opaque Swiss banking system made much of that wealth that was being laundered conveniently ‘disappear’ rather than allowing survivors any attempt to retrieve it.