7pm This episode's headline: Drug Testing on the Job; Defending the Articial Heart; Robert Dole: Leader's View. The guests include In Chicago: PETER BENSINGER, Drug Test Consultant; In Washington: KEVIN ZEESE, Drug Test Opponent; On Capitol Hill: Sen. ROBERT DOLE, Majority Leader; Reports from NewsHour Correspondents: MARYANN KANE (WGBH), in Boston; JAMES ROBBINS (BBC), in Nantes, France; ELIZABETH BRACKETT, in Augusta, Georgia; JUNE CROSS, in Washington. Byline: In New York: ROBERT MacNEIL, Executive Editor; In Washington: JIM LEHRER, Associate Editor; JUDY WOODRUFF, Correspondent
