1967 June 3, 1967 West Berlin

A ban on all protest signs and banners is put in effect on the streets of Berlin. A student, Peter Homann, comes up with an ingenious prank to get around the ban; dress up eight people in tee-shirts, each with a single giant letter painted on the front and back. When lined up side-by-side the group’s tee-shirts read A-L-B-E-R-T-Z-! — referring to Berlin Mayor Heinrich Albertz — and when the group turns around in unison, their backs read A-B-T-R-E-T-E-N — which means “resign.” Photos appear across West Germany the next day — on the far right, with a giant exclamation point on her chest, is Gudrun Ensslin. Despite Homann’s ingenuity, all eight protesters are arrested.