This episode's headline: Shoes: No Protection; Pressuring Pretoria; First Cav's Comeback; Ruth Gordon. The guests include In Washington: CLAYTON YEUTTER, U.S. Trade Representative; In Boston: ANN SEIDMAN, Oxfam; JANET LEVINE, Former Johannesburg City Councilor; Reports from NewsHour Correspondents. Byline: In New York: Ruth Gordon: ROBERT MacNEIL, Executive Editor; In Washington: JIM LEHRER, Associate Editor