Poster publicizing a mock trial to be held at the University of Pennsylvania on behalf of refusenik and prisoner Yosef Begun, "raising the issues of the right to emigrate, the right to national cul... Show morePoster publicizing a mock trial to be held at the University of Pennsylvania on behalf of refusenik and prisoner Yosef Begun, "raising the issues of the right to emigrate, the right to national culture and the right to freedom of religion, under the Soviet constitution." Participants included Alan Dershowitz and others. Show less