 Complete the following phrase:  In 1943 the family home in Berlin was rendered uninhabitable by an air raid and the Klinglers moved permanently to the small country estate at , just outside Osterburg Altmark, which Margarethe had inherited after her father died in 1931. While they were living here Karl Klinglers desk was searched by the Gestapo and he was interrogated about his friends Max Planck and Erich Vagts. His address book was confiscated: it included contact details for his friends son Erwin Planck, who around this time was sentenced to death for involvement in a 