German counterintelligence talks with Russians at Berlin airport. Deutsche Welle. The German Federal Office for the Protection of the Constitution (Counterintelligence) is holding talks with Russian citizens at Berlin-Brandenburg Airport. This is how the department responded to reports according to which some Russians, upon their arrival in the capital, were invited to a voluntary conversation with some workers in civilian clothes. "The conversations and surveys mentioned are not part of the border control at entry and are not carried out by the federal police. The Federal Office for the Protection of the Constitution (BfV) is responsible for conducting these separate surveys. Federal police officers are not present," said the German Federal Police, which deals with border protection and also works at airports.