This episode's headline: MX Vote; Urban Aid Cuts; Toxic Waste Dump Update; Poisoning the Air. The guests include In Washington: COKIE ROBERTS, National Public Radio; GEORGE VOINOVICH, Mayor, Cleveland, Ohio; Rep. HENRY WAXMAN, Democrat, California; Dr. GERALDINE COX, Chemical Manufacturers Association; In Columbus, Ohio: DANA RINEHART, Mayor, Columbus, Ohio; Reports from NewsHour Correspondents: DAVE THOMPSON (KSL-jTV), in Salt Lake City; JEFF GOLDMAN, in Washington; PETER GRAUMANN (KCET), in Los Angeles. Byline: In New York: ROBERT MacNEIL, Executive Editor; CHARLAYNE HUNTER-GAULT, Correspondent; In Washington: JIM LEHRER, Associate Editor