Throughout history, regimes have used terror attacks as a means of control over their populations, and for the last 100 years, Western governments have employed the same measures.

From the tracking of our every move to the loss of our freedom, "State of Control" paints a clear and sobering portrait of the dangers that await us.

With access to recently-opened court files, Julie Etchingham reveals some of the Stasi's UK operations and asks why its other secrets are yet to be revealed.