Following recent revelations about NSA spying, Spiegel has learned that Germany’s Federal Office for the Protection of the Constitution recently issued a security warning to authorities in the country’s 16 states. The domestic intelligence agency warned in an Oct. 30 letter that “an emotional response from certain segments of the population cannot be ruled out” and recommended that “security measures aimed at protecting US facilities in Germany should be increased.” The agency said the background behind the “potential threat” was ongoing discussions about the “collection of Germans’ data by the United States.” …