155
BALLOONS WERE ONE DELIVERY PLATFORM USED BY THE KAMPF- GRUPPE TO POST MESSAGES AND LEAFLETS INTO EAST GERMANY. (BSTU, VIA ENRICO HEITZER).
RID, THOMAS. ACTIVE MEASURES: THE SECRET HISTORY OF DISINFOR- MATION AND POLITICAL WARFARE. FARRAR, STRAUS AND GIROUX. APRIL 2020.