This episode's headline: Dealing with the Kremlin; New Man for the Treasury; Who Pays Taxes?; Pitching Birth Control. The guests include In Washington: Sen. GARY HART, Democrat, Colorado; Sec. RICHARD BURT, State Department; JOSEPH PECHMAN, Tax Expert; Reports from NewsHour Correspondents: KWAME HOLMAN; CHRISTOPHER JONES (BBC), in London; GRAEME SHENTON (BBC), in London. Byline: In New York: ROBERT MacNEIL, Executive Editor; In Washington: JIM LEHRER, Associate Editor