On a mild day in late August a German police helicopter buzzed low over the US consulate in Frankfurt, the financial capital of Germany.
On the instruction of the Office for the Protection of the Constitution (BfV), Germany’s domestic intelligence agency, its mission was to photograph the rooftop of the US outpost, which is located less than 5km from the European Central Bank and Bundesbank.
German media said the BfV hoped to identify the presence of listening antennas and the action prompted an exchange between the US and the German foreign ministry in Berlin.
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