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Arne Treholt was sentenced to 20 years of imprisonment, the most severe punishment of the Norwegian espionage law. But did he really do anything that threatened Norway's security?Arne Treholt was sentenced to 20 years of imprisonment, the most severe punishment of the Norwegian espionage law. But did he really do anything that threatened Norway's security?Arne Treholt was sentenced to 20 years of imprisonment, the most severe punishment of the Norwegian espionage law. But did he really do anything that threatened Norway's security?