This episode's headline: Social Security - Tax Debate; Fighting Back; Pizza Protest; Technology Trap. The guests include SEN. DANIEL PATRICK MOYNIHAN, [D] New York; RICHARD DARMAN, Budget Director; CORRESPONDENTS: ROGER MUDD; FRED DE SAM LAZARO; ESSAYIST: ANNE TAYLOR FLEMING. Byline: In Washington: JAMES LEHRER; In New York: JUDY WOODRUFF