This episode's headline: Affirmative Action Setback?; South Africa Strikes Across the Border. The guests include In Washington: LYLE DENNISTON, Baltimore Sun; PAUL KAMENAR, Washington Legal Foundation; In New York: BURT NEUBORNE, ACLU; LEGWAILA JOSEPH LEGWAILA, Ambassador, Botswona; ABE HOPPENSTEIN, Consul-General, South Africa; REPORTS FROM NEWSHOUR CORRESPONDENTS: JOHN HEWETT (WLNS), in Lansing, Michigan; MICHAEL BUERK (BBC), in Botswana, Africa; DEREK MARQUESS (KBYU TV), in Provo, Utah; TOM BEARDEN, in Jackson, Michigan; STEVE TALBOT (KQED), in Southern Africa. Byline: In New York: ROBERT MacNEIL, Executive Editor; In Washington: JIM LEHRER, Associate Editor