This episode's headline: News Summary; What We Know. The guests include In Moscow: DONALD KIMELMAN, Philadelphia Inquirer; On Capitol Hill: Sen. PATRICK LEAHY, Democrat, Vermont; Sen. MALCOLM WALLOP, Republican, Wyoming; In Washington: DIMITRI SIMES, Soviet Expert; JAMES SCHLESINGER, Former AEC, CIA Chief; In London: JOHN GITTUS, U.K. Atomic Energy Authority; In Pittsburgh: GORDON HURLBERT, Nuclear Power Consultant; Reports from NewsHour Correspondents: MIKE SMARTT (BBC), in Sweden; ROD STEPHEN (Visnews), in Austria. Byline: In New York: ROBERT MacNEIL, Executive Editor; In Washington: JIM LEHRER, Associate Editor
