Premise: Grenzschutzgruppe 9 (GSG 9) (English: Border Protection Group 9 ) is the elite Police Tactical Unit of the German Federal Police (German: "Bundespolizei" ). GSG 9 counterparts on the state level are the Special Deployment Commandos (German: "Spezialeinsatzkommandos (SEK)" ).
Hypothesis: They work only on the borders.