This "top secret" NSA document outlines the SCS unit's capabilities. Another secret list seen by SPIEGEL reveals that its agents are active worldwide in around 80 locations, 19 of which are in Europe -- cities such as Paris, Madrid, Rome, Prague and Geneva. The SCS maintains two bases in Germany, one in Berlin and another in Frankfurt. That alone is unusual. But in addition, both German bases are equipped at the highest level and staffed with active personnel.