Interview with Ex-Stasi Agent 'The Scope of NSA Surveillance Surprised Me'

During the Cold War, West Germany's foreign intelligence service cooperated closely with the NSA. Klaus Eichner, an agent with the East German Stasi, monitored it at the time, and now he tells SPIEGEL what he knew about the collaboration.
Von Michael Sontheimer und Andy Müller-Maguhn
The former NSA listening station on Teufelsberg in Berlin.

The former NSA listening station on Teufelsberg in Berlin.

KIRILL IORDANSKY/ REUTERS
Translated from the German by Charles Hawley
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