Title: Verheizt und vergessen
Subjects: American Espionage, East German Espionage, Espionage, American, Espionage, East German, Germany (East), Germany (East). Ministerium für Staatssicherheit, History, Imprisonment, Intelligence service, Political prisoners, United States, United States. Central Intelligence Agency
Places: Germany (East)
People: Hannes Sieberer, Herbert Kierstein