Conversely, these Habsburg resistance groups were very offensive against the National Socialist terrorist state. The plans of the Habsburg resistance fighter Karl Burian, who was later executed, to blow up the Gestapo headquarters in Vienna are considered a unique attempt in the German Reich to act aggressively against the Gestapo. Plans and production facilities for V-2 rockets, Tiger tanks and aircraft were also very successfully passed on to the Allies via the Austrian resistance group led by Heinrich Maier.[67][68][69][70]